In Situ Synthesis of TiB/Ti6Al4V Composites Reinforced with Nano TIE through SPS

被引：11
作者：
Cao, Yuankui [1 ]
Zeng, Fanpei [2 ]
Lu, Jinzhong [2 ]
Liu, Bin [1 ,2 ]
Liu, Yong [1 ]
Li, Yunping [3 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Fujian Longxi Bearing Grp Corp LTD, Zhangzhou 363000, Peoples R China
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9800812, Japan
来源：
MATERIALS TRANSACTIONS | 2015年 / 56卷 / 02期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
titanium matrix composites; titanium boride (TiB); microstructure; spark plasma sintering; TITANIUM MATRIX COMPOSITES; MECHANICAL-PROPERTIES; TI-6AL-4V ALLOY; MICROSTRUCTURE; PLASMA; BORON; TEMPERATURE; EVOLUTION; SIZE;
D O I：
10.2320/matertrans.M2014347
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium matrix composites reinforced with TiB whiskers were in situ synthesized by spark plasma sintering (SPS) at a temperature range of 1173-1473 K, using a mixture of 6.2 mass% TiB2, 4.1 mass% Ti, and 89.7 mass% Ti6Al4V powders. The in-situ synthesis mechanism and the effect of sintering temperature on the sintering microstructure were investigated. The results show that an increase of the sintering temperature causes the relative densities of the composites to increase and the reaction between Ti and TiB2 to be more complete. Nano-sized TiB reinforcements with a diameter of around 80 nm and fine-grained matrix with an average grain size of 12 mu m are obtained after SPSed at 1373 K. Clean and perfect TiB/matrix interfaces without debonding or cracks are obtained during SPS process. Low sintering temperature and short sintering time are believed to be the main reasons for the improved fine-grained microstructure.
引用
收藏
页码：259 / 263
页数：5
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