Microstructure evolution of Ti5Si3in Cu-Ti-Si alloys

被引：8
|
作者：
Liu, Qing [1 ,3 ]
Zhang, Xiao-cui [2 ]
Wang, Qiang [1 ]
Miao, Wen-zhi [1 ,3 ]
Li, Chun-yan [1 ,3 ]
Ding, Hai-min [1 ,3 ]
机构：
[1] North China Elect Power Univ, Sch Energy Power & Mech Engn, Baoding 071003, Peoples R China
[2] State Grid Shandong Elect Power Maintenance Co, Jinan 250021, Peoples R China
[3] North China Elect Power Univ, Hebei Key Lab Elect Machinery Hlth Maintenance &, Baoding 071003, Peoples R China
来源：
CHINA FOUNDRY | 2020年 / 17卷 / 04期
关键词：
microstructures; Cu alloys; Ti5Si3; intermetallic compounds; TG146; 1(+)1; A; HIGH-TEMPERATURE SYNTHESIS; WEAR PROPERTIES; MORPHOLOGY; SILICIDES; TI5SI3; PHASE;
D O I：
10.1007/s41230-020-9140-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The Cu-Ti-Si alloys containing in-situ formed Ti(5)Si(3)are prepared. In order to clarify the Ti(5)Si(3)formation processes and its microstructure characteristics, the as-cast and deeply etched Cu-Ti-Si alloys with different compositions and cooling rates were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). It is found that the eutectic Ti(5)Si(3)phases in Cu-Ti-Si alloys are rod-like with hexagonal cross section which tend to intertwine with each other to form a firm skeleton like a bird nest structure which can make the alloys keep their original shape even after etching off the Cu matrix. In addition, there is Cu in the center of many Ti(5)Si(3)rods, resulting in a core-shell structure. With the increase of the cooling rate, Ti(5)Si(3)distributes more uniformly, and the diameter of Ti(5)Si(3)significantly decreases, with a minimum size of less than 100 nm, while the aspect ratio of Ti(5)Si(3)increases.
引用
收藏
页码：286 / 292
页数：7
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