Effects of CeO2 additive on the microstructure and mechanical properties of in situ TiB2/Al composite

被引：43
|
作者：
Xue, Jing [1 ]
Wang, Jun [1 ]
Han, Yanfeng [1 ]
Li, Pan [1 ]
Sun, Baode [1 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 05期
关键词：
In situ TiB2 particle; Rare earth CeO2; Dispersion; Mechanical properties; AL-TIB2; COMPOSITE; GRAIN-REFINEMENT; WEAR BEHAVIOR; ALUMINUM; PERFORMANCE; PARTICLES; ALLOY;
D O I：
10.1016/j.jallcom.2010.10.152
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：
In this paper, CeO2 was investigated as an additive for in situ preparation of TiB2/Al composite using an exothermic reaction process via K2TiF6 and KBF4 salts. Experimental results indicated that when 0.5 wt.% CeO2 additive was added, the dispersion of TiB2 particles was improved significantly. Meanwhile, alpha-Al matrix grain was further refined. Compared with the composite without CeO2, the ultimate tensile strength, yield strength, elastic modulus and tensile elongation increased by 8%, 7%, 26% and 14%, respectively in as-cast condition, and the tensile fracture behavior of the composite with CeO2 belonged to a typical ductile fracture with microvoid coalescence. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1573 / 1578
页数：6
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