Nano-Y2O3 effects on the electrical contact properties of Al2O3-Cu/ 35Cr3TiB2 composites

被引：4

作者：

Ma, Zipeng ^{[1
]}

Zhou, Meng ^{[1
]}

Tian, Baohong ^{[1
,2
]}

Zhang, Yi ^{[1
,2
]}

Li, Heng ^{[1
]}

Li, Xu ^{[3
]}

Zou, Jin ^{[4
]}

Hu, Haoyan ^{[1
]}

Jing, Ke ^{[1
]}

Liu, Yong ^{[1
,2
]}

Volinsky, Alex A. ^{[5
]}

机构：

[1] Henan Univ Sci & Technol, Prov & Ministerial Coconstruct Collaborat Innovat, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China

[2] Henan Prov Key Lab Nonferrous Mat Sci & Proc Tech, Luoyang 471023, Peoples R China

[3] Natl Inst Metrol, Ctr Adv Measurement Sci, Beijing 100029, Peoples R China

[4] Jiangxi Acad Sci, Jiangxi Key Lab Adv Copper & Tungsten Mat, Nanchang 330096, Peoples R China

[5] Univ S Florida, Dept Mech Engn, 4202 E Fowler Ave,ENG 030, Tampa, FL 33620 USA

来源：

MATERIALS CHARACTERIZATION | 2024年 / 207卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Copper-based composites; Electrical contact; Material transfer; Arc energy; Welding force; ARC EROSION BEHAVIOR; SINTERING TEMPERATURE; MICROSTRUCTURE; INFILTRATION; PARTICLES; RESISTANCE; MECHANISM; COATINGS; AGTIB2; SCALE;

D O I：

10.1016/j.matchar.2023.113474

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al2O3-Cu/35Cr3TiB2 and 0.5Y2O3/Al2O3-Cu/35Cr3TiB2 electrical contact composites were prepared by vacuum hot pressing sintering endo-oxidation method. Both composites were over 98% dense with tensile strengths of 395 MPa and 413 MPa and compressive strengths of 839 MPa and 898 MPa, respectively. The TEM results showed that Cr and TiB2 particles along with Al2O3 nanoparticles generated by internal oxidation were uniformly distributed in the Cu matrix. The addition of Y2O3 had almost no negative effects on the electrical conductivity and hardness of the composites. The electrical contact parameters such as arc energy, arc duration, and weld force between pairs of contacts were analyzed. The material transfer direction of both composite contacts was from cathode to anode. The average welding force of the contacts decreased by 24.6% after the addition of Y2O3, and the material transfer and loss decreased by 28.6% and 42% at 35 A current, respectively. The addition of Y2O3 reduced the arc energy and duration by 43.7% and 55.9% at 25 A and 35 A, respectively, and improved the stability of the contacts during disconnect and closure.

引用

页数：14

共 49 条

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