摘要
目的:探讨升温速率及烧结温度对氧化铝玻璃复合体(AGC)的微观影响。方法:精细微米α-氧化铝经250MPa冷等静压成型,分别在1400℃、1450℃及高、低两种升温速率下烧结后渗透玻璃,采用扫描电镜和X光衍射对复合体进行微观形貌及相分析。结果:经低速率升温至1400℃烧结的氧化铝制备的AGC,其断裂方式基本为沿晶断裂;而经高速率升温分别至1400℃,1450℃和低速率升温至1450℃烧结的氧化铝制备的AGC断口同时存在着沿晶断裂和穿晶断裂两种方式;AGC试样X光衍射图谱显示特征峰均为氧化铝的特征峰,而基底则表明了玻璃相的存在。结论:烧结温度、升温速率均会对氧化铝玻璃复合体的微观形貌产生影响,而对相结构不会产生影响。
Objective： To study the effects of sintering temperature and calefactive velocity on the alumina-glass-composite（AGC）. Methods： Sintered aluminan oxide （SAO） was prepared by fine micron-sized alumina powder, compacted via 250MPa moulding by isostatic pressing and then sintered at 1400℃ and 1450℃ respectively, as well as different kinds of calefactive velocity. Micro-textures and phase analysis were tested by scanning electron microscopy and light diffraction. Results： The fracture mode ofAGC sintered at a slow calefactive velocity speed to 1400℃ was intergranular fracture. That of other groups was co-existence of intergranular fracture and trans-granular fracture; XRD patterns showed characteristic peaks of alumina, while the substrate indicated that the existence of a glass phase. Conclusion： Both sintering temperature and the calefactive velocity speed could influence the properties of AGC. But these could not influence the Phase structure of AGC.
出处
《口腔颌面修复学杂志》
2009年第5期294-297,共4页
Chinese Journal of Prosthodontics
基金
国家自然科学基金资助(项目编号:50872152)
北京市科技计划专项课题资助(项目编号:Z08000303220806)
关键词
玻璃渗透
烧结温度
微观形貌
相分析
alumina glass composites
sintering temperature
micro-textures
phase analysis
