NiAl／TiB_2复合材料的自蔓延燃烧合成

SELF-PROPAGATING COMBUSTION SYNTHESIS OF NiAl/TiB_2 COMPOSITE

研究了Ｎｉ－Ａｌ－Ｔｉ－Ｂ系统的自蔓延燃烧合成过程的物理－化学变化和微观结构变化．结果表明：影响合成过程的主要因素是ＴｉＢ_２掺量．微观研究发现：原位生长的ＴｉＢ_２颗粒的平均尺寸受合成温度影响，同时，在合成产物的表面有ＴｉＢ_２纤维生成，其数量和生长状态受生长空间的影响．

Investigation was carried out on physico-chemical and microstructural changes during self-propagating combustion synthesis of the Ni-Al-Ti-B system. The principal factor influenced on the process was found to be the amount of TiB_2 doped. Microstructural observation revealed that the average size of TiB_2 particles, grown in situ, is dependent on the synthesising temperature. Meanwhile,some TiB_2 fibres occurred on the synthesised products,and their amount as well as growth morphology seemed to be affected by the growing space.