Synthesis of near net shape high density TiB/Ti composite
Synthesis of near net shape high density TiB/Ti composite
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DOI：
10.1016/s0921-5093(97)00643-6
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发表时间：
1997-12
期刊：
影响因子：
6.4
通讯作者：
Takahisa Yamamoto;A. Otsuki;K. Ishihara;P. H. Shingu
中科院分区：
文献类型：
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作者：
Takahisa Yamamoto;A. Otsuki;K. Ishihara;P. H. Shingu
采用自蔓延高温合成技术(SHS)在准热等静压条件下制备了TiB/Ti复合材料。对合成条件进行了优化，制备出了符合高TiB体积分数的高密度材料。在α-到β-Ti转变温度(1155K)以上，Ti和B粉末发生了自蔓延反应。该复合材料由钛基体和弥散分布的TiB反应产物组成，其尺寸为2~30μm。当B/Ti原子比为0.3~0.4，准等静压为100 Mpa时，可制备出TiB/Ti体积比为33~44vol.%的近全致密复合材料。复合材料的维氏硬度为5.6-7.1 Gpa，断裂应力为2.1-2.3 Gpa，磨损量约为钛和Ti-6Al-4V的7-9%。
TiB/Ti composite were produced by SHS (self propagating high temperature synthesis) under conditions of PHIP (pseudo-hot isostatic pressing). The synthesis conditions were optimized to produce highly dense materials conforming a high volume fraction of TiB. Self-propagating reaction of the Ti and B powders occurred above the α- to β-Ti transformation temperature (1155 K). The composites consist of Ti matrices with dispersed TiB reaction products of 2–30 μm size. Near fully dense composites with a TiB/Ti volume ratio of 33–44 vol.% were synthesized for B/Ti atomic ratios of 0.3–0.4 at pseudo isostatic pressures of 100 MPa. The Vickers hardness and fracture stress of the composites are 5.6–7.1 and 2.1–2.3 GPa, respectively, and the wear of the composite is approximately 7–9% of the Ti and Ti–6Al–4V.