摘要
研究了添加剂为Y2O3、Al2O3、AlN的Sialon材料的高温性能。晶化处理后，其断裂韧性由4MPa·m1／2提高到6MPa·m1／2；高温强度到1100℃仍不明显降低；抗热震临界温差达△Tth＝473℃。其高温断裂为蠕变机制，符合裂纹准静态扩展机理。裂纹准静态扩展是热震损伤的控制因素。
The high temperature properties of Y2O3 、Al2O3、 AlN sialon material were studied. Its fracture toughness aftercrystallizing treatment was increased from 4MPa·m1/2 to 6 MPa·m1/2. Its high temperature strength didn' t decreasewhen temperature was to 1100℃. Since its critical temperature differentia of thermal shock resistance was up to △Tth= 473 ℃, it was possessed of good thermal shock resistance. The break of high temperature is creep mechanism. This iscorrespondent with the sub-critical crack propagation mechanism. Sub-critical crack propagation is a controlling factor ofthermal shock decline.
出处
《耐火材料》
EI
CAS
北大核心
1998年第2期66-69,73,共5页
Refractories
关键词
高温
性能
晶化
蠕变
烧结
耐火材料
氨化硅
Sialon, High temperature property, Crystallizing treatment, Creep
