Evolution of primary phases and high-temperature compressive behaviors of as-cast AuSn20 alloys prepared by different solidification pathways

被引：24

作者：

Tan, Qingbiao ^{[1
]}

Deng, Chao ^{[2
]}

Mao, Yong ^{[2
]}

He, Guo ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Yunnan Univ, Sch Phys Sci & Technol, Dept Mat Sci & Engn, Kunming 650091, Peoples R China

来源：

GOLD BULLETIN | 2011年 / 44卷 / 01期

基金：

中国国家自然科学基金;

关键词：

AuSn20; alloy; Primary phase; Eutectic solidification; Rapid solidification; Hot working; HIGH-POWER; EUTECTIC ALLOY; COOLING RATE; GOLD-TIN; SUPERPLASTICITY; MICROSTRUCTURE; DIAGRAM; SILICON;

D O I：

10.1007/s13404-011-0004-y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The as-cast AuSn20 eutectic alloys prepared by four different solidification pathways have been investigated in terms of the microstructure and the high-temperature compressive behaviors. The primary phases appeared in the four alloys are very sensitive to the cooling rate, which decrease in the size and the volume fraction as the cooling rate increases. The morphologies of the primary zeta'-Au5Sn phase are in dendritic at low cooling rate and change to rosette-like at high cooling rate. When the cooling rate is about 3.5x 10(4) K/min, the primary zeta'-Au5Sn can be suppressed but small delta-AuSn particles appear instead as the primary phase. The compressive behaviors at 220 degrees C exhibit a low yielding stress and a long stress platform for the alloy prepared by injection casting with a copper crucible, which indicates an advantageous processing route for the production of the AuSn20 strips or foils.

引用

页码：27 / 35

页数：9