TiN/TiB2纳米复合材料的合成与性能研究
首发时间:2007-12-24
摘要:本研究通过高能球磨和高温高压实验方法制备了块体TiN/TiB2纳米复合材料。通过X光衍射和拉曼光谱对材料的微观结构变化进行了研究。实验结果表明,采用金属Ti和六方BN为原料,在球磨过程和高温高压实验过程中,TiN先于TiB2形成。球磨70小时后有少量的纳米晶TiN开始形成。在高温高压实验中,样品腔的合成温度低于1300℃时,没有TiB2出现。当温度达到1300℃后,合成TiN和TiB2的复合材料。对所合成的块状材料的热膨胀性和导电性能进行了测试研究。
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Synthesis and properties on TiN/TiB2 Composite Materials
Abstract:Planetary milling and subsequent high-pressure high temperature treatment fabricated TiN/TiB2 composite materials. The structure developments of the materials were monitored by X-Ray diffraction and Raman spectrum. The mechanisms of ball milling and high-pressure high temperature technique were researched in detail. It was found that the diffraction peaks of ヤ々TiNx appeared after milling 50 hours. No self-propagating high temperature synthesis (SHS) reaction was found during the whole milling process. The sample that milled for 70 hours was transformed into TiN/TiB2 composite materials after subsequent high-pressure high temperature treatment (5GPa and 1300∩).
Keywords: Mechanical Alloying, High-pressure high temperature, TiN, TiB2, Composite materials
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