利用钛与B4C反应经普通的熔铸工艺制备了原位合成TiB和TiC增强的钛基复合材料.研究了原位合成钛基复合材料的高温力学性能和断裂机理.结果表明:随着温度的升高,其抗拉强度降低,伸长率提高.但与基体钛合金比较,由于原位合成增强体非常稳定,能有效地强化基体合金,明显提高了复合材料的高温抗拉强度.拉伸断裂机理与温度有关,室温时,增强体断裂是材料失效的主要原因;而随着温度的提高,增强体与基体合金界面脱粘成为材料失效的主要原因.
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