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AlN和AlN/BN層狀復(fù)合陶瓷的高溫氧化行為
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陜西省自然科學(xué)基金(SJ08-ZT04)


Oxidation Behavior of AlN and AlN/BN Laminated Composites Ceramics at High Temperatures
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    摘要:

    采用循環(huán)氧化法對單相AlN和層狀A(yù)lN/h-BN復(fù)合陶瓷在1000及1300 ℃空氣中的氧化動力學(xué)曲線進(jìn)行研究。結(jié)果指出,在1000 ℃時,層狀A(yù)lN/h-BN復(fù)合陶瓷的氧化增量低于單相AlN陶瓷;在1300 ℃時,其氧化動力學(xué)曲線分為緩慢增重、快速氧化增重和拋物線增重3個階段,由XRD分析及掃描電鏡觀察發(fā)現(xiàn),在1300 ℃氧化30 h后,試樣已不存在BN相,并且由于界面層BN的氧化揮發(fā)而殘留有微孔

    Abstract:

    The oxidation kinetics curves of both AlN and AlN/BN laminated composite ceramics at 1000 and 1300 ℃ were studied using a cycle-oxidation method. The result shows that the weight increase of AlN/h-BN laminated ceramic composites is lower than AlN ceramic at 1000 ℃, and the oxidation dynamics curve of AlN/BN laminated composite ceramics could be divided into three courses at 1300 ℃: a slowly weight increase, a rapid weight increase and a parabola shape weight increase. The XRD analysis and SEM observations show that there was no BN inside the AlN/BN laminated composite ceramics after 1300 ℃ oxidation and the micropores remain due to the vaporizing of B2O3 oxidized by BN

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張 濤,金海云,趙繼峰,金志浩. AlN和AlN/BN層狀復(fù)合陶瓷的高溫氧化行為[J].稀有金屬材料與工程,2009,38(11):2008~2011.[Zhang Tao, Jin Haiyun, Zhao Jifeng, Jin Zhihao. Oxidation Behavior of AlN and AlN/BN Laminated Composites Ceramics at High Temperatures[J]. Rare Metal Materials and Engineering,2009,38(11):2008~2011.]
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  • 收稿日期:2009-06-12
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