Effects of CeO2 additive on the microstructure and mechanical properties of in situ TiB2/Al composite
Effects of CeO2 additive on the microstructure and mechanical properties of in situ TiB2/Al composite
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DOI：
10.1016/j.jallcom.2010.10.152
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发表时间：
2011-02-03
影响因子：
6.2
通讯作者：
Sun, Baode
中科院分区：
文献类型：
--
作者：
Xue, Jing;Wang, Jun;Sun, Baode
本文研究了CeO 2作为添加剂通过K2 TiF 6和KBF 4盐的放热反应原位制备TiB 2/Al复合材料。实验结果表明，当0.5wt.% CeO 2添加剂的加入显著改善了TiB 2颗粒的分散性。同时，α-Al基体晶粒进一步细化。与未添加CeO 2的复合材料相比，铸态下复合材料的抗拉强度、屈服强度、弹性模量和伸长率分别提高了8%、7%、26%和14%，拉伸断裂行为属于典型的微孔聚合型韧性断裂。(C)2010爱思唯尔有限公司版权所有。
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.