Microstructure and Mechanical Properties of In-suit Synthesized TiB Whiskers Reinforced Titanium Matrix Composites by High-velocity Compaction

摘要：

　　High-velocity compaction (HVC) technology was applied to press titanium-based blended elemental powders containing boron sources of TiB2 and LAB6, and in-situ TiB whiskers rein forced titanium matrix composites (TMCs, TiB/Ti -4.5Al-6.8Mo-1.5Fe) was successfully prepared after vacuum sintering at 1250 ℃ for 3 h.The effects of forming ability of the blended powders by HVC and TiB volume fraction (5-20 %) on microstructure and mechanical properties of composites were studied.The results showed that the blended powders could be pressed by HVC into green com pacts with relative density no less than 94 %.So it is possible to fabricate dense TiB reinforced TMCs by a following simple vacuum sintering process.The hardness and brittleness of TMCs increased with in creasing the TiB content And the TMCs with 10 % TiB had relative density of 98.24% and the maxi mum tensile strength of 1147 MPa.When the TiB content increased further, the homogeneity of TMCs decreased, which deteriorated the tensile strength drastically.The properties of the matrix alloy were also studied.

关键词： high-velocity compaction (HVC) titanium matrix composites (TMCs) mi crostructure mechanical properties

作者: Zhiqiao Yan Feng Chen Yixiang Cai Yukai Zheng

作者单位: Department of Powder Metallurgy,Guangzhou Research Institute of Non-ferrous Metals,363 Changxing Rd.,Tianhe,Guangzhou,510650,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 425-430

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）