Microstructure and properties of Cu-Cr powder metallurgical alloy induced by high-current pulsed electron beam

被引：21
作者：
Dong, Shuheng [1 ]
Zhang, Conglin [1 ]
Zhang, Lingyan [2 ]
Cai, Jie [3 ]
Lv, Peng [1 ]
Jin, Yunxue [4 ]
Guan, Qingfeng [1 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Nanjing 212013, Jiangsu, Peoples R China
[2] Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China
[3] Jiangsu Univ, Engn Inst Adv Mfg & Modern Equipment Technol, Zhenjiang 212013, Peoples R China
[4] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 212013, Jiangsu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 755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：
High-current pulsed electron beam (HCPEB); Cu-Cr alloys; Microstructure; Microhardness; Wear behavior; TEMPERATURE OXIDATION RESISTANCE; SURFACE MICROSTRUCTURE; STEEL; LAYER;
D O I：
10.1016/j.jallcom.2018.04.291
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The purpose of paper is to investigate the microstructure and properties of Cu-Cr alloys induced by high-current pulsed electron beam (HCPEB) irradiation. Microstructure of the alloying layer was studied by means of X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM). The microhardness and friction property were also tested. The microstructure reveals that craters were formed which were fused and eliminated to form flat surface with increase of the pulse number. Additionally, the inter-diffusion of Cu and Cr elements caused component homogenization of the surface melted layer. Besides, the fine grains/particles and Cu (Cr) solid solution were formed. Those factors accounted for a significant increase in microhardness. The lowest COF and wear rate were attributed to the ultrafine Cr particles in the hard Cu matrix. (C) 2018 Elsevier B.V. All rights reserved.
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页码：251 / 256
页数：6
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