摘要
研究了Ｓｉ３Ｎ４－ＺｒＯ２复合材料在高温高应力条件下的抗氧化能力。结果表明：（１）Ｓｉ３Ｎ４－ＺｒＯ２复合材料的抗氧化性主要取决于表面状态和ＺｒＮ的生成量；当表面有较多的ＺｒＮ（超过４０％）时，在高温下氧化很快进行，并渗透到内部；当表面有一层Ｓｉ２Ｎ２Ｏ或者无ＺｒＮ时，其氧化程度很轻。（２）Ｓｉ３Ｎ４－ＺｒＯ２材料具有较强的抗热冲击能力和抗高温压应力能力。
The oxidation resistance of Si 3N 4 ZrO 2 composite under high stress was investigated. The experimental results were as follows:(a)The oxidation resistance of Si 3N 4 ZrO 2 composite depended mainly on the amount of ZrN which was formed during sintering. When some ZrN was formed on the surface of sintered samples,the sample was oxidated quickly under high stress at 1100℃. On the other hand,when some Si 2N 2O was formed or no ZrN on the surface of the sample,the sample was very difficult to oxidate. (b)The thermal shock resistance and compressive stress at high temperature of Si 3N 4 ZrO 2 composite were better. \
出处
《粉末冶金技术》
CAS
CSCD
北大核心
1997年第2期135-138,共4页
Powder Metallurgy Technology
关键词
氮化硅
高温氧化
高温应力
复合粉末
氧化锆
silicon nitride\ high temperature oxidation\ high temperature stress
