Ｂ４Ｃ与Ｔｉ在１８００°Ｃ×３５ＭＰa×１ｈ的烧结条件下反应生成了TiB2 棒晶，棒晶长度在１０～３０μｍ，其长径比在２～８范围．原位生成的棒晶赋予了材料具有极高的力学性能，材料的弯曲强度和断裂韧性分别为 ６８０ＭＰａ和 １２ＭＰａ·ｍ１／２．通过 Ｘ射线衍射检测了材料的物相组成，利用扫描电镜及透射电镜观察了材料的显微结构．最后讨论了温度及金属Ｔｉ含量对棒晶ＴiＢ2的生成及发育的影响．
The rod-like phases TiB2 were formed by the reaction of B4C and Ti under 1800℃×35MPa×1h
sintering condition, the length of particle TiB2 was 10～30μm, some over 40μm; and the aspect ratio was 2～8. These rod-like phases
endowed the composites with high mechanical properties. The bending strength and the fracture toughness of the composites were 680MPa and 12MPa·m1/2,
respectively. The phases were examined by XRD; the microstructure of the composites was observed by SEM and TEM. The influence of sintering
temperature and Ti content on the growth and development of rod-like phases TiB2 was discussed.
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