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锆刚玉莫来石-氮化硼系复合材料抗热震性的研究
作者:赵海雷 李文超 钟香崇 王俭 
单位:北京科技大学理化系 
关键词:锆刚玉莫来石 氮化硼 复合材料 抗热震性 
分类号:TQ175.71
出版年,卷(期):页码:1996,24(3):0-0
DOI:
摘要:
对以锆刚玉莫来石为基引入10%~30%(以质量计,下同)BN和以BN为基引入10%~30%锆刚玉莫来石的两类试样进行了抗热震性的研究。结果表明:在氧化物基料中引入BN,可以明显提高材料的抗热震性,认为这主要是BN的热膨胀系数的各向异性而引起的大量微裂纹所致。在BN基料中引入不超过20%锆刚玉莫来石时,材料仍保持其优良的抗热震性。BN的编织状结构可以缓冲热震应力,阻碍热震裂纹的扩展。
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Thermal -shock resistance properties were studied for two groups of specimens,viz.,zirconiacorundum-mullite as a base material with addition of 10%~30% (in mass)BN,boron nitride as a base material with addition of 10%~30% (in mass) zirconia-corundum-mullite. Experimental results reveal that addition of BN to oxide-based material improves thermal-shock resistance obviously. This may be attributed to the presence of microcrack induced by thermal expansion anisotropy of BN. When the addition of zirconia-corundummullite in BN-based material is not more than 20%(in mass).the composite still retains excellent thermalshock resistance. It is considered that BN interwoven structure can reduce some thermal shock stress and prevent crack propagation due to thermal shock.
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基金项目:
国家耐火材料“八五”攻关项目国家自然科学基金
作者简介:
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参考文献:
1钟香崇.我国耐火材料基础研究的一些进展.硅酸盐学报,1990;18(5):4502 钟香崇.展望90年代我国耐火材料的发展,耐火材料,1993;27(2):633 赵海雷,李文超,钟香崇等.氮化硼对锆刚玉莫来石材料力学性能及显微结构的影响.硅酸盐学报,1994;22(5),5094 王新福.Ce-TZP-ZTM 系陶瓷材料的抗热震性研究:[硕士论文].天津:天津大学材料系,19905 HasselmanDPH.Thermalstressresistanceparametersforbrittlerefractoryceramics.BullAmCeramSoc,1970;49(12):10336张清纯.陶瓷材料的力学性能.北京:科学出版社,1987:2797RossiRC.Thermal-shock-resistantceramiccomposites,BullAmCeramSoc,1969;48(7):7368HasselmanDPH,SinghJP.Analysis ofthermalstressresistanceofmicrocrackedbrittleceramics.AmCeramSocBull,1979:58(9):8569HasselmanDPH.Unifiedtheoryofthermalshockfractureinitiationandcrackpropagationinbrittleceramics.JAmCeramSoc,1969;52:60010DavidgeRW.MechanicalBehaviourofCeramics.London:CambridgeUniversityPress,1979;Charp8:11811.赵海雷,李文超,钟香崇 等.锆刚玉莫来石对氮化硼材料显微结构及力学性能的影响.耐火材料,1994,28(4):192 
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