喷雾造粒ZrO2粉料坯体性能的研究

摘要

The green compact properties of ZrO2 spray-dried powders were studied by means of pressure-density compaction curves of the powder and SEM photographs . The results show found that the granule size distribution of the spray-dried powder has a smaller effect on the green compact density . Granule yield strength, which depends on the dimension of granules and the relative humidity in the environment, is a critical factor influencing the uniformity of green compact microstructures . Therefore, plasticizing granules and eliminating larger granules can improve the microstructure of the green compact .%以喷雾造粒ZrO2粉料为研究对象，通过对粉料的压力 -密度曲线及坯体的SEM显微结构分析，发现喷雾造粒粉料的粒度分布对坯体密度的影响较小；颗粒强度的大小是获得均匀的坯体结构的关键，颗粒的强度与其大小及环境湿度有关，因此颗粒适当的增塑及去除大颗粒均有利于坯体显微结构的改善．