助熔剂对原位转化炭纤维/氧化铝复合材料组织结构与性能的影响
以聚丙烯腈预氧化纤维为先驱体,氧化铝为主要原料,添加SiO2-MgO-CaO三系助熔剂,采用真空热压烧结法制备原位转化炭纤维增韧氧化铝陶瓷基复合材料.研究助熔剂对复合材料相结构、显微组织以及密度、硬度和断裂韧性的影响.结果表明：助熔剂的添加使复合材料在较低的烧结温度下便实现烧结,且提高复合材料的密度和力学性能.助熔剂在烧结过程中与氧化铝形成镁铝尖晶石等第二相,在晶界起钉扎效应,抑制氧化铝晶粒的长大,消除气孔,促进复合材料的致密化,改善炭纤维与基体间的界面结合强度,提高复合材料的韧性....
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| Published in | 材料工程 no. 12; pp. 54 - 58 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国矿业大学(北京)机电与信息工程学院材料科学与工程系,北京,100083
2013
|
| Subjects | |
| Online Access | Get full text |
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| Abstract | 以聚丙烯腈预氧化纤维为先驱体,氧化铝为主要原料,添加SiO2-MgO-CaO三系助熔剂,采用真空热压烧结法制备原位转化炭纤维增韧氧化铝陶瓷基复合材料.研究助熔剂对复合材料相结构、显微组织以及密度、硬度和断裂韧性的影响.结果表明：助熔剂的添加使复合材料在较低的烧结温度下便实现烧结,且提高复合材料的密度和力学性能.助熔剂在烧结过程中与氧化铝形成镁铝尖晶石等第二相,在晶界起钉扎效应,抑制氧化铝晶粒的长大,消除气孔,促进复合材料的致密化,改善炭纤维与基体间的界面结合强度,提高复合材料的韧性. |
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| AbstractList | TB332; 以聚丙烯腈预氧化纤维为先驱体,氧化铝为主要原料,添加SiO2-MgO-CaO三系助熔剂,采用真空热压烧结法制备原位转化炭纤维增韧氧化铝陶瓷基复合材料.研究助熔剂对复合材料相结构、显微组织以及密度、硬度和断裂韧性的影响.结果表明:助熔剂的添加使复合材料在较低的烧结温度下便实现烧结,且提高复合材料的密度和力学性能.助熔剂在烧结过程中与氧化铝形成镁铝尖晶石等第二相,在晶界起钉扎效应,抑制氧化铝晶粒的长大,消除气孔,促进复合材料的致密化,改善炭纤维与基体间的界面结合强度,提高复合材料的韧性. 以聚丙烯腈预氧化纤维为先驱体,氧化铝为主要原料,添加SiO2-MgO-CaO三系助熔剂,采用真空热压烧结法制备原位转化炭纤维增韧氧化铝陶瓷基复合材料.研究助熔剂对复合材料相结构、显微组织以及密度、硬度和断裂韧性的影响.结果表明：助熔剂的添加使复合材料在较低的烧结温度下便实现烧结,且提高复合材料的密度和力学性能.助熔剂在烧结过程中与氧化铝形成镁铝尖晶石等第二相,在晶界起钉扎效应,抑制氧化铝晶粒的长大,消除气孔,促进复合材料的致密化,改善炭纤维与基体间的界面结合强度,提高复合材料的韧性. |
| Author | 曹晶晶 陈华辉 杜飞 陈功哲 |
| AuthorAffiliation | 中国矿业大学（北京）机电与信息工程学院材料科学与工程系,北京100083 |
| AuthorAffiliation_xml | – name: 中国矿业大学(北京)机电与信息工程学院材料科学与工程系,北京,100083 |
| Author_FL | CHEN Hua-hui CAO Jing-jing CHEN Gong-zhe DU Fei |
| Author_FL_xml | – sequence: 1 fullname: CAO Jing-jing – sequence: 2 fullname: CHEN Hua-hui – sequence: 3 fullname: DU Fei – sequence: 4 fullname: CHEN Gong-zhe |
| Author_xml | – sequence: 1 fullname: 曹晶晶 陈华辉 杜飞 陈功哲 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.3969/j.issn.1001-4381.2013.12.010 |
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| DocumentTitleAlternate | Effect of Sintering Additives on Microstructures and Properties of In-situ Transformed Carbon Fiber/Alumina Composites |
| DocumentTitle_FL | Effect of Sintering Additives on Microstructures and Properties of In-situ Transformed Carbon Fiber/Alumina Composites |
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| Keywords | 助熔剂 fracture toughness 原位转化炭纤维 sintering additive in-situ transformed carbon fiber 界面 断裂韧性 interface |
| Language | Chinese |
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| Notes | 11-1800/TB CAO Jing-jing,CHEN Hua-hui,DU Fei,CHEN Gong zhe （Department of Materials Science and Engineering,School of Mechanical Electronic ~ Information Engineering,China University of Mining g〉 Technology（Beijing）, Beijing 100083, China） In-situ transformed carbon fibers toughened alumina composites were prepared by hot-press- ing sintering in vacuum, using pre-oxidized polyacrylonitrile fibers as the precursor and alumina as the main raw material, and by adding SiO2-MgO-CaO sintering additives. Effect of sintering additives on phase structure, microstructures, density, hardness and fracture toughness of the composites was studied. The results show that the composites can be densified at a relatively low temperature of 1650℃ via the liquid phases sintering mechanism and the density and mechanical properties of the composites increase with adding sintering additives. The sintering additives react with alumina to gen- erate spinel phase as pinning in the grain boundary and inhibit alumina grain growth. Furtherm |
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| Publisher | 中国矿业大学(北京)机电与信息工程学院材料科学与工程系,北京,100083 |
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| SubjectTerms | 助熔剂 原位转化炭纤维 断裂韧性 界面 |
| Title | 助熔剂对原位转化炭纤维/氧化铝复合材料组织结构与性能的影响 |
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