| 碳纳米管增韧超细Ti(C|N)基金属陶瓷 |
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| 引用本文： | 章晓波,刘宁,李勇.碳纳米管增韧超细Ti(C|N)基金属陶瓷[J].复合材料学报,2009,26(1):91-95. |
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| 作者姓名： | 章晓波 刘宁 李勇 |
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| 作者单位： | 合肥工业大学,材料科学与工程学院,合肥,230009 |
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| 基金项目： | 日本玻璃板基金，安徽省自然科学基金 |
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| 摘 要： | Ti(C，N)基金属陶瓷的低韧性限制了其广泛应用于切削刀具领域。为探究碳纳米管对超细Ti(C，N)基金属陶瓷断裂韧性的影响，采用化学镀工艺在碳纳米管表面镀Ni，采用粉末冶金法真空烧结制备了不同碳纳米管含量的超细Ti(C，N)基金属陶瓷。研究了不同含量镀镍和未镀镍的碳纳米管对Ti(C，N)金属陶瓷组织和断裂韧性的影响。扫描电镜照片表明 , 添加CNTs后，组织中出现无芯晶粒及微孔洞。压痕法测试断裂韧性的结果表明，纳米管的加入使超细Ti(C，N)金属陶瓷的断裂韧性提高 29. 4 %～62. 7 % , 碳纳米管增韧机制为裂纹偏转和桥接增韧、无芯晶粒增韧及微孔洞增韧。此外，随着碳纳米管含量的增加，超细CNTs/Ti(C，N)金属陶瓷复合材料的相对密度和硬度均有轻微下降。添加镀镍和未镀镍碳纳米管对超细Ti(C，N)金属陶瓷都具有很好的增韧作用。
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| 关 键 词： | 碳纳米管 化学镀镍 金属陶瓷 断裂韧性 增韧机制 |
| 收稿时间： | 2007-12-27 |
| 修稿时间： | 2008-03-12 |
Ultra-fine Ti(C,N) based cermets toughened by carbon nano-tubes |
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| ZHANG Xiaobo,LIU Ning,LI Yong.Ultra-fine Ti(C,N) based cermets toughened by carbon nano-tubes[J].Acta Materiae Compositae Sinica,2009,26(1):91-95. |
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| Authors: | ZHANG Xiaobo LIU Ning LI Yong |
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| Affiliation: | School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China |
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| Abstract: | Because of the low fracture toughness,Ti(C,N) based cermets are limited for wider utilization in the field of cutting tools,carbon nano-tubes(CNTs) were deposited with Ni by electroless plating and the ultra-fine Ti(C,N)based cermets with various CNTs mass fractions were made by vacuum sintering in order to study the effect of CNTs on the fracture toughness of ultra-fine Ti(C,N)based cermets.The effect of different CNTs contents both Ni deposited and undeposited on the microstructure and fracture toughness ... |
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| Keywords: | arbon nano-tubes electroless plating Ni cermets fracture toughness toughening mechanism |
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