• Complex
  • Title
  • Author
  • Keyword
  • Abstract
  • Scholars
Search
High Impact Results & Cited Count Trend for Year Keyword Cloud and Partner Relationship

Query:

学者姓名:卢秉恒

Refining:

Source

Submit Unfold

Co-Author

Submit Unfold

Language

Submit

Clean All

Export Sort by:
Default
  • Default
  • Title
  • Year
  • WOS Cited Count
  • Impact factor
  • Ascending
  • Descending
< Page ,Total 76 >
Scalable fabrication of holey graphene nanosheets by electrochemical intercalation and microwave-assisted expansion of graphite EI SCIE
期刊论文 | 2021 , 560 | APPLIED SURFACE SCIENCE
Abstract&Keyword Cite

Abstract :

Holey graphene nanosheets (HGNS) contain nanoholes on the surface of graphene sheets and these nanoholes can provide the rich mass transfer channel for the electrons and the ions, thus induce more hole edge defects, controllable band gap and better mechanical stability. Here, HGNS were massive production by dualelectrochemical intercalation and microwave-assisted expansion of graphite. The final obtained HGNS contain few layer graphene (5-10 layers), with ultralow defects (ID/IG < 0.07) and higher electrical conductivity (691S/ cm). The holey anodic graphene nanosheets demonstrate a narrow peak of pore size distribution centering at around 1.13 nm, 3 nm and a broad range from 3 nm to 252 nm centered at 68 nm, which denoting the characters of micropore, mesoporous and macropore structure. The holey cathodic graphene nanosheets with the feature of mesoporous and macropore structure in which the pore size in the range of 2 nm-252 nm centered at 3.18 nm, 68 nm.

Keyword :

Ultralow defects Holey graphene nanosheets Few layer graphene

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Ji, Qianyu , Wang, Bowen , Zheng, Yajuan et al. Scalable fabrication of holey graphene nanosheets by electrochemical intercalation and microwave-assisted expansion of graphite [J]. | APPLIED SURFACE SCIENCE , 2021 , 560 .
MLA Ji, Qianyu et al. "Scalable fabrication of holey graphene nanosheets by electrochemical intercalation and microwave-assisted expansion of graphite" . | APPLIED SURFACE SCIENCE 560 (2021) .
APA Ji, Qianyu , Wang, Bowen , Zheng, Yajuan , Zeng, Fanguang , Lu, Bingheng . Scalable fabrication of holey graphene nanosheets by electrochemical intercalation and microwave-assisted expansion of graphite . | APPLIED SURFACE SCIENCE , 2021 , 560 .
Export to NoteExpress RIS BibTex
高速高精光固化增材制造技术前沿进展
期刊论文 | 2021 , 41 (1) , 128-138 | 西安科技大学学报
Abstract&Keyword Cite

Abstract :

增材制造技术被称为新工业革命的标志性技术,立体光刻在能源器件、加工材料、制造方案的迭代中,发展出多种高分子材料快速成形技术方案.作为制造技术关键评价的速度、精度指标,始终引领着宏微观尺度光固化增材制造技术发展方向,推动形成崭新的技术方案.光固化增材制造技术由早期的激光点扫描成形,逐步发展出面制造、体制造.文中通过分析近5年来国内外高速高精光固化前沿文献,讨论了7种方法的技术原理、关键器件能力限制、创新特点和其面临的工程应用问题,包括体成型技术:计算轴向光刻技术和激光全息投影技术;面成型技术:连续液面生长技术、双波长光源直写光刻技术、高速大尺寸技术、飞秒投影双光子光刻微纳技术、双紫外臭氧动态掩模技术.并比较了这7种技术的科学依据技术原理与工程问题,揭示该技术的迭代演化规律和潜在应用场景.

Keyword :

增材制造 高速高精 光固化 前沿进展 成型新方法

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 宗学文 , 张佳亮 , 周升栋 et al. 高速高精光固化增材制造技术前沿进展 [J]. | 西安科技大学学报 , 2021 , 41 (1) : 128-138 .
MLA 宗学文 et al. "高速高精光固化增材制造技术前沿进展" . | 西安科技大学学报 41 . 1 (2021) : 128-138 .
APA 宗学文 , 张佳亮 , 周升栋 , 闫丹 , 倪铭佑 , 李素丽 et al. 高速高精光固化增材制造技术前沿进展 . | 西安科技大学学报 , 2021 , 41 (1) , 128-138 .
Export to NoteExpress RIS BibTex
以铣代镗工艺研究
期刊论文 | 2021 , (9) , 69-74 | 制造技术与机床
Abstract&Keyword Cite

Abstract :

提出采用展成圆代替插补圆的原理设计了特殊的主轴结构,实现孔的以铣代镗加工工艺,并进行了实验验证.采用正交方法进行切削实验设计,分析不同工艺参数对孔特征精度(尺寸精度、圆度、孔壁粗糙度)的影响,验证以铣代镗加工孔的可行性,并研究得出影响孔特征精度的主要工艺参数.结果发现,在铣代镗孔加工过程中,影响孔特征精度(尺寸精度、圆度)最大的因素为轴向进给速度,其次主轴转速;而影响孔特征精度(孔壁粗糙度)最大的因素为主轴转速.最后,选取某汽车变速箱壳体类零件加工为案例进行实际验证,分别对比以铣代镗加工与镗削加工,相比较采用镗削方式加工,以铣代镗加工能够节省加工刀具成本,提高加工效率.实验结果对于先进孔加工工艺研究具有重要的参考价值.

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 王磊 , 张琼 , 汤永凯 et al. 以铣代镗工艺研究 [J]. | 制造技术与机床 , 2021 , (9) : 69-74 .
MLA 王磊 et al. "以铣代镗工艺研究" . | 制造技术与机床 9 (2021) : 69-74 .
APA 王磊 , 张琼 , 汤永凯 , 卢秉恒 . 以铣代镗工艺研究 . | 制造技术与机床 , 2021 , (9) , 69-74 .
Export to NoteExpress RIS BibTex
Friction and Wear Performance of Different Forming Surfaces of Ti6Al4V Alloy Formed by Selective Laser Melting EI SCIE
期刊论文 | 2021 , 50 (6) , 2106-2111 | RARE METAL MATERIALS AND ENGINEERING
Abstract&Keyword Cite

Abstract :

Ti6Al4V titanium alloy was prepared by selective laser melting (SLM) technology. The effects of different forming surfaces (XOY, XOZ) and different loads (20, 40, 60, 80 N) on the friction and wear properties of Ti6Al4V alloy were studied. The friction and wear properties of different forming surfaces were evaluated by friction coefficient (COF) combined with wear volume loss, and the wear track morphology and wear mechanism were characterized by optical microscope (OM) and three-dimensional profile measuring instrument. The results show that compared with the XOZ surface, the wear volume of the XOY surface is reduced by 0.27x10(-5) mm(3) when the normal load is 20 N, and the average friction coefficient is smaller. However, when the load is greater than 20 N, the wear volume and average friction coefficient of XOY surface are larger than those of XOZ surface. The depth and width of the plough groove of the worn track increase with the increase of the load. The plough groove exhibits obvious peeling behavior, and there is a blocky "adhesive" distributing on the track, causing adhesive wear and oxidative wear. From the aspects of friction coefficient, wear volume and micro-morphology, it is quantitatively reflected that XOZ surface of Ti6Al4V alloy formed by SLM has better friction and wear performance than XOY surface, and XOY surface shows better wear resistance only under low load.

Keyword :

anisotropy friction and wear selective laser melting microstructure Ti6Al4V

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zong Xuewen , Zhang Jian , Lu Bingheng et al. Friction and Wear Performance of Different Forming Surfaces of Ti6Al4V Alloy Formed by Selective Laser Melting [J]. | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (6) : 2106-2111 .
MLA Zong Xuewen et al. "Friction and Wear Performance of Different Forming Surfaces of Ti6Al4V Alloy Formed by Selective Laser Melting" . | RARE METAL MATERIALS AND ENGINEERING 50 . 6 (2021) : 2106-2111 .
APA Zong Xuewen , Zhang Jian , Lu Bingheng , Li Weidong . Friction and Wear Performance of Different Forming Surfaces of Ti6Al4V Alloy Formed by Selective Laser Melting . | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (6) , 2106-2111 .
Export to NoteExpress RIS BibTex
Constitutive model and microstructural evolution of hot deformation of investment-cast Ti-4Al-0.005B alloy EI SCIE
期刊论文 | 2021 , 8 (5) | MATERIALS RESEARCH EXPRESS
Abstract&Keyword Cite

Abstract :

Hot compression tests of investment-cast Ti-4Al-0.005B (TA5) alloy were conducted over a wide temperature range of 750 degrees C-850 degrees C at strain rates of 0.01-1 s(-1). Based on the flow stress curve and dynamic material model, a constitutive equation is established. The thermal deformation behavior and microstructural evolution of investment-cast TA5 alloy at high temperatures is systematically analyzed. The results show that the Zener-Hollomon parameter ' s formula calculates the apparent activation energy of TA5 as 469893 J center dot mol(-1), alpha is 0.0032, and the apparent value of n is 12.34. The peak flow stress decreases with increasing deformation temperature and decreasing strain rate. At high strain rates, the grains appear nonuniform and exhibit microcracks. Thus, high temperature and low-strain rate are beneficial to the occurrence of slip. Under these conditions, grain boundaries can sufficiently migrate, the microstructure remains compact and stable, and dynamic recrystallization grains distribution is more uniform. Therefore, the high-temperature and low-strain zone is most suitable for processing TA5 alloy.

Keyword :

Constitutive model 005B Ti-4Al-0 hot deformation

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zong Xuewen , Zhang Jian , Lu Bingheng . Constitutive model and microstructural evolution of hot deformation of investment-cast Ti-4Al-0.005B alloy [J]. | MATERIALS RESEARCH EXPRESS , 2021 , 8 (5) .
MLA Zong Xuewen et al. "Constitutive model and microstructural evolution of hot deformation of investment-cast Ti-4Al-0.005B alloy" . | MATERIALS RESEARCH EXPRESS 8 . 5 (2021) .
APA Zong Xuewen , Zhang Jian , Lu Bingheng . Constitutive model and microstructural evolution of hot deformation of investment-cast Ti-4Al-0.005B alloy . | MATERIALS RESEARCH EXPRESS , 2021 , 8 (5) .
Export to NoteExpress RIS BibTex
Feasibility Analysis of 3D Printing With Prenatal Ultrasound for the Diagnosis of Fetal Abnormalities SCIE PubMed
期刊论文 | 2021 | JOURNAL OF ULTRASOUND IN MEDICINE
Abstract&Keyword Cite

Abstract :

Objective To assess the feasibility and accuracy of 3D printing with prenatal three-dimensional ultrasound (3DUS) in the diagnosis of fetal abnormalities. Methods Fetuses initially diagnosed with various abnormalities were included in this retrospective study. The fetuses were examined by 3DUS, modeled, and 3D printed, and the dimensional accuracy of the 3D prints was analyzed. The effectiveness, demand, necessity of 3D printing, and the diagnostic accuracy of different methods were analyzed based on questionnaire responses from 40 senior ultrasound doctors and 40 postgraduate students. Results A total of 12 fetuses with cleft lip and palate, spinal, heart, or brain abnormalities were included for detailed assessment. All deviations (mean deviation: 0.1 mm) between the original images and the final 3D prints lay within the consistency boundary (-1.12, 1.31 mm) (P > .05). In the subsequent analyses, 90.8% of the doctors and 94.2% of the students strongly agreed that 3D printing could precisely represent and depict fetal abnormalities. The average misdiagnosis rate of the doctors decreased from 5% to 0.4% after the application of 3D printing combined with 3DUS in comparison with 3DUS alone, and the corresponding value for the students dropped from 17.9% to 5.2%. Conclusions The errors in modeling and 3D printing based on 3DUS were within acceptable limits, and 3D printing improved the diagnosis of various fetal abnormalities.

Keyword :

diagnosis prenatal ultrasound fetal abnormalities 3D printing feasibility

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Liang, Jixiang , Ma, Qiang , Zhao, Xin et al. Feasibility Analysis of 3D Printing With Prenatal Ultrasound for the Diagnosis of Fetal Abnormalities [J]. | JOURNAL OF ULTRASOUND IN MEDICINE , 2021 .
MLA Liang, Jixiang et al. "Feasibility Analysis of 3D Printing With Prenatal Ultrasound for the Diagnosis of Fetal Abnormalities" . | JOURNAL OF ULTRASOUND IN MEDICINE (2021) .
APA Liang, Jixiang , Ma, Qiang , Zhao, Xin , Pan, Guangyu , Zhang, Gen , Zhu, Bin et al. Feasibility Analysis of 3D Printing With Prenatal Ultrasound for the Diagnosis of Fetal Abnormalities . | JOURNAL OF ULTRASOUND IN MEDICINE , 2021 .
Export to NoteExpress RIS BibTex
Effect of oxidization of 3D-SiC preforms on the interfacial structure and mechanical properties of co-continuous SiC/Al composites EI SCIE
期刊论文 | 2021 , 47 (10) , 14635-14646 | CERAMICS INTERNATIONAL
Abstract&Keyword Cite

Abstract :

In this study, co-continuous SiC/Al composites with oxidized 3D-SiC preforms and pure aluminum (oxidizedSiC3D/Al) were fabricated by the vacuum-pressure infiltration technique. The interfacial structure and mechanical properties of the oxidized-SiC3D/Al composites were investigated. The results suggested an improvement in interfacial structure between Al and the oxidized SiC preforms due to the formation of a continuous interfacial reaction layer with a non-uniform thickness. This layer mainly consisted of an Al2O3 phase with nonoriented lamellae and approximately equiaxed particles. However, the Al2O3 phase could not form a sufficiently dense layer to provide complete protection from the effects of direct contact with Al and SiC. Segregation of Si atoms was observed next to and in the interfacial reaction layers, which existed as free state Si and a supersaturated solid solution in Al. The dissolution of a few Si atoms into the Al phase near the interface was observed, which probably resulted in the formation of stacking faults. There was an optimal thickness of the interfacial reaction layer (-580 nm) for the mechanical properties of oxidized-SiC3D/Al composites, where the compressive strength (-887 MPa) and three-point bending strength (-251 MPa) were enhanced by 18% and 15%, respectively, compared with those of the as-received SiC3D/Al composite.

Keyword :

Co-continuous SiC Al composites Interfacial structure Mechanical properties Oxidized modification Interfacial reaction

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zhu, Jingbo , Wang, Yangwei , Bao, Chonggao et al. Effect of oxidization of 3D-SiC preforms on the interfacial structure and mechanical properties of co-continuous SiC/Al composites [J]. | CERAMICS INTERNATIONAL , 2021 , 47 (10) : 14635-14646 .
MLA Zhu, Jingbo et al. "Effect of oxidization of 3D-SiC preforms on the interfacial structure and mechanical properties of co-continuous SiC/Al composites" . | CERAMICS INTERNATIONAL 47 . 10 (2021) : 14635-14646 .
APA Zhu, Jingbo , Wang, Yangwei , Bao, Chonggao , Lu, Bingheng . Effect of oxidization of 3D-SiC preforms on the interfacial structure and mechanical properties of co-continuous SiC/Al composites . | CERAMICS INTERNATIONAL , 2021 , 47 (10) , 14635-14646 .
Export to NoteExpress RIS BibTex
Low-Roughness-Surface Additive Manufacturing of Metal-Wire Feeding with Small Power SCIE PubMed
期刊论文 | 2021 , 14 (15) | MATERIALS
Abstract&Keyword Cite

Abstract :

Aiming at handling the contradiction between power constraint of on-orbit manufacturing and the high energy input requirement of metal additive manufacturing (AM), this paper presents an AM process based on small-power metal fine wire feed, which produces thin-wall structures of height-to-width ratio up to 40 with core-forming power only about 50 W. In this process, thermal resistance was introduced to optimize the gradient parameters which greatly reduces the step effect of the typical AM process, succeeded in the surface roughness (Ra) less than 5 mu m, comparable with that obtained by selective laser melting (SLM). After a 10 min electrolyte-plasma process, the roughness of the fabricated specimen was further reduced to 0.4 mu m, without defects such as pores and cracks observed. The ultimate tensile strength of the specimens measured about 500 MPa, the relative density was 99.37, and the Vickers hardness was homogeneous. The results show that the proposed laser-Joule wire feed-direct metal deposition process (LJWF-DMD) is a very attractive solution for metal AM of high surface quality parts, particularly suitable for rapid prototyping for on-orbit AM in space.

Keyword :

fine metal wire direct metal deposition wire feed additive manufacturing laser and Joule heating surface roughness

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Bobo , Wang, Bowen , Zhu, Greg et al. Low-Roughness-Surface Additive Manufacturing of Metal-Wire Feeding with Small Power [J]. | MATERIALS , 2021 , 14 (15) .
MLA Li, Bobo et al. "Low-Roughness-Surface Additive Manufacturing of Metal-Wire Feeding with Small Power" . | MATERIALS 14 . 15 (2021) .
APA Li, Bobo , Wang, Bowen , Zhu, Greg , Zhang, Lijuan , Lu, Bingheng . Low-Roughness-Surface Additive Manufacturing of Metal-Wire Feeding with Small Power . | MATERIALS , 2021 , 14 (15) .
Export to NoteExpress RIS BibTex
Research on Multi-bead Overlapping Process of Wire and Arc Additive Manufacturing Based on Cold Metal Transfer EI CSCD Scopus
期刊论文 | 2020 , 56 (1) , 141-147 | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering
SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

Multi-bead overlapping process of wire and arc additive manufacturing (WAAM) based on the cold metal transfer (CMT) is studied systematically. By using 2319 aluminum wire as the filling material, experiments are carried out with the constant wire-feed rate and various travel speeds. The cross section’s morphology of the obtained single beads are separately fitted by the three selected models, including the parabola model, arc model and cosine model. The experimental results showed that both the parabola and arc functions could accurately represent the bead profile. Based on parabola model, the single-layer multi-pass overlapping model is then established. The theoretical optimal overlapping width is calculated to be 0.715 times that of the layer width. To verify the accuracy of this model, single-layer two-bead samples are produced with different overlapping rates, including the traditional flat-topped overlapping rate 0.6. The experimental results showed that the model proposed is more in line with the manufacturing process of WAAM based on the CMT. When the overlapping rate is determined, the smaller the single-layer height is, the better would the formed surface profile be, which is propitious for the subsequent multi-layer multi-bead parts fabricating. Based on the optimized overlapping parameters, the multi-layer multi-bead part was fabricated with good surface appearance. And the mechanical properties in three directions are analyzed as well. © 2020 Journal of Mechanical Engineering.

Keyword :

Industrial research 3D printers Aluminum alloys Morphology Wire Additives

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Fang, Xuewei , Bai, Hao , Yao, Yunfei et al. Research on Multi-bead Overlapping Process of Wire and Arc Additive Manufacturing Based on Cold Metal Transfer [J]. | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering , 2020 , 56 (1) : 141-147 .
MLA Fang, Xuewei et al. "Research on Multi-bead Overlapping Process of Wire and Arc Additive Manufacturing Based on Cold Metal Transfer" . | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 56 . 1 (2020) : 141-147 .
APA Fang, Xuewei , Bai, Hao , Yao, Yunfei , Zhang, Lijuan , Lu, Bingheng . Research on Multi-bead Overlapping Process of Wire and Arc Additive Manufacturing Based on Cold Metal Transfer . | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering , 2020 , 56 (1) , 141-147 .
Export to NoteExpress RIS BibTex
Precise control of variable-height laser metal deposition using a height memory strategy EI SCIE
期刊论文 | 2020 , 57 , 222-232 | Journal of Manufacturing Processes | IF: 5.01
WoS CC Cited Count: 2
Abstract&Keyword Cite

Abstract :

In respect of laser metal deposition (LMD) 3-D additive manufacturing technology, the method of non-parallel slicing is applied for the deposition of the overhanging and unequal-height parts and is capable of improving the deposition accuracy, stability and efficiency. Nevertheless, the produced uneven top surface derived from variable height deposition process has a possibility to result in instability and even failure of the deposition. In this study, the novel control strategies for the precise control of the unequal-height part were proposed. An inside-beam powder feeding nozzle was applied for the deposition with large overhanging angle. Based on a developed deposition height control system, multiple PI controllers were designed for varying desired deposition heights in an unequal-height layer. The actual heights of the uneven top surface in different positions were memorized by the deposition of a layer, and the process parameters for the next layer could be planned in advance to smooth this unevenness. Under the proposed control strategies, a geometrical stable and convergent process was made achievable when depositing a 'fan-shaped' part and a 'bent-pipe-shaped' part as the typical overhanging and unequal-height structures. The microstructures were observed to be uniform and compact, and the grain sizes and microhardness in different height positions were found to vary slightly. © 2020

Keyword :

Industrial engineering Operations research Deposition

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Shi, Tuo , Shi, Jianjun , Xia, Zhixin et al. Precise control of variable-height laser metal deposition using a height memory strategy [J]. | Journal of Manufacturing Processes , 2020 , 57 : 222-232 .
MLA Shi, Tuo et al. "Precise control of variable-height laser metal deposition using a height memory strategy" . | Journal of Manufacturing Processes 57 (2020) : 222-232 .
APA Shi, Tuo , Shi, Jianjun , Xia, Zhixin , Lu, Bingheng , Shi, Shihong , Fu, Geyan . Precise control of variable-height laser metal deposition using a height memory strategy . | Journal of Manufacturing Processes , 2020 , 57 , 222-232 .
Export to NoteExpress RIS BibTex
10| 20| 50 per page
< Page ,Total 76 >

Export

Results:

Selected

to

Format:
FAQ| About| Online/Total:1129/98471371
Address:XI'AN JIAOTONG UNIVERSITY LIBRARY(No.28, Xianning West Road, Xi'an, Shaanxi Post Code:710049) Contact Us:029-82667865
Copyright:XI'AN JIAOTONG UNIVERSITY LIBRARY Technical Support:Beijing Aegean Software Co., Ltd.