摘要
采用热重分析方法，研究不同ＺｒＯ２含量（１０％～４０％）的无压烧结Ｏ＇－Ｓｉａｌｏｎ－ＺｒＯ２材料在１２５０～１３５０℃的氧化过程。结果表明．在１２５０℃的氧化过程缓慢，只有很少的重量变化，但在１３５０℃时，氧化速度增加。氧化增重随时问的变化遵循抛物线方程（△Ｗ／Ａ０）２＝Ｋｐ０·ｔ＋Ｂ０。１３５０℃氧化后的表面氧化层主要由α－方石英、ＺｒＯ２（ｍ·ｔ）、ＺｒＳｉＯ４及非品质相组成。
The oxidation process of O'-Sialon.ZrO2 composite specimens with 10%～40% ZrO2 content;prepered by pressureless sintering in the temperature range 1250～1350℃ has been studied by the thermogravimetric methiod.The results indicate that at 1250℃ oxidation Prooceeds very slowly;only small weight changes are observed. However at1350℃, the oxidation rate increases rapidly. The weisht gain-time relationship follows the diabolic equation:(△W/A0)2=K. t+Bo. The surface layers of the specimens after oxidation tests at 1350℃ are found to be commped of α-cristohalite,ZrO2(m and t),zircon and noncrystalline phase.
出处
《耐火材料》
CAS
北大核心
1995年第3期125-128,共4页
Refractories
