研究了通过高能球磨制备ＴｉＢ２／ＴｉＣ纳米复合粉体的反应过程和机理，对粉体的显微结构进行了表征．实验结果表明，采用金属 Ｔｉ和 Ｂ４Ｃ为原料，在球磨过程中， ＴｉＣ先于 ＴｉＢ２形成．球磨５ｈ后Ｔｉ与Ｂ４Ｃ反应生成ＴｉＢ２和ＴｉＣ，在随后的长时间高能球磨过程中ＴｉＢ２和ＴｉＣ两相保持稳定．球磨 ３０ｈ后，直径约 ８ｎｍ的 ＴｉＣ纳米粒子分布在 １００～２００ ｎｍ的 ＴｉＢ２粒子中，形成均匀分布的纳米ＴｉＢ２／ＴｉＣ复合粉体．
The process and the mechanism of TiB2/TiC nano-composite powder fabricated via high energy milling were studied, and as-prepared powders were characterized by TIM and XRD techniques. The results show that Ti can react with B4C during milling process, and TiC is firstly produced, TiB2/TiC particles formed after 5 hours milling. TiB2 and TiC phases co-exist in following long time milling. After 30 hours milling, nanosized TiC particles with a diameter of 8 urn are located in TiB2 particles with a size of 100-200nm.
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