ZrO2含量对超重力下燃烧合成快速凝固Al2O3/ZrO2(4Y)复合陶瓷的影响
Effect of ZrO2 Content on Rapidly Solidified Composite Ceramic Al2O3/ZrO2(4Y) Prepared by Combustion Synthesis under High Gravity
摘 要
采用超重力下燃烧合成技术,以快速凝固方式制备了Al2O3/ZrO2(4Y)复合陶瓷,用XRD、SEM与EDS等研究了ZrO2含量对复合陶瓷显微结构和性能的影响.结果表明:当复合陶瓷中ZrO2质量分数在34.1%～46.4%时,复合陶瓷的显微结构主要为棒晶;当质量分数为49.6%～53.7%时,其显微结构主要为形状不规则的ZrO2球晶;随着ZrO2含量的增加,复合陶瓷的相对密度逐渐降低(最高可达94.3%),而硬度和断裂韧度均呈先增高后降低的趋势,当ZrO2质量分数为42.6%时,硬度和断裂韧度均达到最高值,分别为13.1 GPa和13.5 MPa·m1/2.
燃烧合成
超重力
ZrO2含量
Al2O3/ZrO2 (4Y)
combustion synthesis
high gravity
ZrO2 content
Abstract
Based on combustion synthesis technology under high gravity to prepare rapidly solidified composite ceramic Al2O3/ZrO2 (4Y),the influence of ZrO2 content on microstructure and properties of solidified composite ceramics Al2O3/ZrO2 (4Y) was investigated through XRD,SEM and EDS.The results show that the main microstructure of the ceramic was rod-shaped eutectic colonies as the ZrO2 content was in the range of 34.1%-46.4%,and the microstructure transformed to be isolated spherically-shaped ZrO2 grains as the ZrO2 content was in the range of 49.6%-53.7%.With the ZrO2 content increasing,the relative density of the ceramic decreased,the maximum value was 94.3%,whereas the hardness and the fracture toughness increased first and then decreased.The maximum hardness value of the composite ceramic reached 13.1 GPa as the ZrO2 content was 426%,and the maximum fracture toughness value of 13.5 MPa·m1/2 was also obtained.
中图分类号 E917
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(50672131)
收稿日期 2008/8/9
修改稿日期 2009/3/18
网络出版日期
作者单位点击查看
备注杨权(1983-),男,山西朔州人,硕士研究生.
引用该论文: YANG Quan,ZHAO Zhong-min,ZHANG Long,PAN Chuan-zeng,SONG Ya-lin,LIU Ming-jun. Effect of ZrO2 Content on Rapidly Solidified Composite Ceramic Al2O3/ZrO2(4Y) Prepared by Combustion Synthesis under High Gravity[J]. Materials for mechancial engineering, 2009, 33(8): 40～45
杨权,赵忠民,张龙,潘传增,宋亚林,刘明军. ZrO2含量对超重力下燃烧合成快速凝固Al2O3/ZrO2(4Y)复合陶瓷的影响[J]. 机械工程材料, 2009, 33(8): 40～45
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参考文献
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【8】左演声,陈文哲,梁伟.材料现代分析方法[M].北京:北京工业大学出版社,2000.
【9】席文君,殷声,赖和怡.重力场中铝热剂的燃烧特性研究[J].粉末冶金技术,2001,19(6):348-350.
【10】CALDERON-MORRENO M J,YOSHIMURA M.Effect of melt quenching on the subsolidus equilibria in the ternary system Al2O3/Y3Al5O12/ZrO2[J].Solid State Ionics,2001,141/142:343-349.
【11】KURTZ W,FISHER D J.Fundamental Solidification[M].Clausthal:Trans Tech Publications,1998.
【12】FARMER S C,SAYIR A.Tensile strength and microstructure of Al2O3-ZrO2 hypo-eutectic fibers[J].Engineering Fracture Mechanics,2002,69:1015-1024.
【13】朱浩,赵忠民.超重力下燃烧合成Al2O3/ZrO2的成分、结构与性能[J].特种铸造及有色金属,2009(5):455-458.
【14】马伟民,修稚萌,闻雷,等.PSZ(3Y)含量对Al2O3陶瓷力学性能的影响[J].金属学报,2003,39(9):999-1003.
【15】胡汉起.金属凝固原理[M].北京:机械工业出版社,2000.
【16】周曦亚,方培育.自增韧陶瓷复合材料的研究[J].中国陶瓷,2003,39(6):30-33.
【17】龚江宏.陶瓷材料断裂力学[M].北京:清华大学出版社,2001.
【18】BECHER P F.Microstructural design of toughened ceramics[J].J Am Ceram Soc,1991,74(2):255-269.
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