摘要
利用六面顶压机,实现了Al/AlN陶瓷材料的超高压烧结,对比研究了La2O3对烧结体烧结性能和显微结构的影响。结果表明：无助剂烧结时,烧结体致密化在1300℃-1500℃才表现出来;而La2O3在低温1100℃-1300℃就可以表现出助烧特性,烧结体在1500℃保温30min就可以达到最大致密度。在压力为5.0GPa、温度1500℃、烧结周期为50min的条件下,得到的烧结体显微结构致密,晶粒大小均匀,多为六角晶形。
The influence of La2O3 on the sintering properties and microstructure of Al/AlN composites were studied,which were made by high pressure and high temperature（HPHT） apparatus（China type,SPD^-6×1200）.The results show that the densification of composites without additives happens at 1300～1500℃;while La2O3 can present sintering-supporting property at low temperature 1100～1300℃ and the composites with La2O3 can gain the highest density after heating for only 30 min at 1500℃.The composite sintered under 5.0 GPa and 1500℃ for 50 min has dense microstructure,most of the crystal grains are hexagonal with nearly homogenous size.
出处
《超硬材料工程》
CAS
2007年第3期24-27,共4页
Superhard Material Engineering
基金
国家自然科学基金(50572032)资助
关键词
超硬材料
Al/AlN复相陶瓷
超高压烧结
烧结性能
superhard material
AL/AIN composite
sintering property
super-high pressure sintering
