摘要
基于Ｂａ０．５Ｍｇ３（Ｓｉ３ＡｌＯ１０）Ｆ２－Ｍｇ２Ａ１４Ｓｉ５Ｏ１８－Ｃａ３（ＰＯ４）２系统，制备出了以含Ｂａ碱士云母为主晶相的可切削玻璃陶瓷，弯曲强度σｂ＝２２９ＭＰａ，断裂韧性Ｋｌｃ＝２．４８ＭＰ·ｍ１／２；钻孔速度大于７ｍｍ／ｍｉｎ．优良性能的获得借助于Ｂａ云母玻璃陶瓷可控的显微组织，即相互交错的云母体和“卷心菜”的组织特征．观察到了两类类型的断口形貌：云母晶体层内断的层状花样和沿（００１）晶面层间断的小刻面花样．
Glass-ceramics containing barium-mica in the system of Ba0.5Mg3(Si3AlO10)F2-Mg2Al4Si5O18 Ca3(PO4)2 show high mechanical strength and good machinability, orb=229MPa, Klc=2.48MPa.m1/2,drilling speed>7mm/min. Such good properties are attributable to the controlled microstructure of the barium-mica-coutaining glass-ceramics,i.e.interlocking mica crystals and ' cabbage- head' feature. Two kinds of typical fracture pattern were observed,i.e.layer lacks pattern and cleaVage pattern.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第1期29-32,共4页
Journal of Inorganic Materials
关键词
玻璃陶瓷
机械强度
可切削性
晶相
云母
glass-ceramics
mechanical strength
machinability
microstructure analysis
