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,碳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.
参考文献
| [1] | Clark E B,Roebuck B.Extending the application areas for titanium carbonitride cermets[J].Refractory Metals & Hard Materials,1992,11(1):23-33. |
| [2] | Liu N,Yin W H,Zhu L W.Effect of TiC/TiN powder size on microstrncture and properties of Ti(C,N)-based cermets[J].Materials Science and Engineering A,2007,445/446:707-716. |
| [3] | Chao S,Liu N,Yuan Y P,et al.Microstructure and mechanical properties of ultrafine Ti (CN)-based cermets fabricated from nano/submicrnn starting powders[J].Ceramics International,2005,31 (6):851-862. |
| [4] | Zheng Y,Xiong W H,Liu W J,et al.Effect of nano addition on the microstructures and mechanical properties of Ti(C,N)-based cermets[J].Ceramics International,2005,31(1):165-170. |
| [5] | 许育东,刘宁,石敏,等.纳米增强金属陶瓷的组织及热冲击性能[J].复合材料学报,2006,23(5):44-50.Xu Yudong,Liu Ning,Shi Min,et al.Microstructural characteristic and thermal shock resistance of nano-powder reinforcing cermets[J].Acta Materiae Compositae Sinica,2006,23(5):44-50. |
| [6] | Joardar J,Kim S W,Kang S.Effect of nanoerystalline binder on the microstructure and mechanical properties of ultrafine Ti (CN) eermets[J].Materials Science and Engineering A,2003,360(1/2):385-389. |
| [7] | Iijima S.Helical microtubules of graphitic carbon[J].Nature,1991,354(7):56-58. |
| [8] | 祖胜臻,迟伟东,沈曾民,等.碳纳米管/炭复合材料的制备及其性能的研究[J].炭素技术,2006,25(2):11-15.Zu Shengzhen,Chi Weidong,Shen Zengmin,et al.Preparation and investigation on properties of CNTs/C composites[J].Carbon Techniques,2006,25(2):11-15. |
| [9] | 赵东林,卢振明,沈曾民.镀Ni-P和Ni-N合金碳纳米管的磁性能及其复合材料的微波吸收性能[J].复合材料学报,2004,21(3):54-58.Zhao Donglin,Lu Zhenming,Shen Zengmin.Magnetic property of Ni-P and Ni-N alloy coated carbon nanotubes and microwave absorbing property of their composites[J].Acta Materiae Compositae Sinica,2004,21(3):54-58. |
| [10] | 吴惠菁,丁桂甫,王裕超,等.锌基碳纳米管复合材料的界面特性及增强机理[J].复合材料学报,2007,24(4):88-94.Wu Huijing,Ding Guifu,Wang Yuchao,et al.Interracial characteristic and reinforcement mechanism of the carbon nanotube/zinc composite[J].Acta Materiae Compositae Sinica,2007,24(4):88-94. |
| [11] | Jiang D T,Thomson K,Kuntz J D,et al.Effect of sintering temperature on a single-wall carbon nanotube-toughened alumina-based nanocomposite[J].Scripta Materialia,2007,56(11):959-962. |
| [12] | Qian D,Dickey E C,Andrews R,et al.Load transfer and deformation mechanisms in carbon nanotube-polystyrene composites[J].Applied Physics Letters,2000,76(20):2868-2870. |
| [13] | Siegel R W,Chang S K,Ash B J.Mechanical behavior of polymer and ceramic matrix nanocomposites[J].Scripta Materialia,2001,44(8/9):2061-2064. |
| [14] | Vasiliev A L,Poyato R,Padture N P.Single-wall carbon nanotubes at ceramic grain boundaries[J].Scripta Materialia,2007,56(6):461-463. |
| [15] | Xia Z,Riester L,Curtin W A,et al.Direct observation of toughening mechanisms in carbon nanotube ceramic matrix composites[J].Acta Materialia,2004,24:931-944. |
| [16] | 王赛玉,熊惟皓.碳纳米管及稀土元素钇(Y)对高Ni含量Ti(C,N)基金属陶瓷组织与性能的影响[J].金属热处理,2007,32(7):12-15.Wang Saiyu,Xiong Weihao.Effect of carbon nanotubes and Y (yttrium) on microstructure and properties of Ti(C,N)-based cermets with high Ni content[J].Heat Treatment of Metals,2007,32(7):12-15. |
| [17] | Park S,Kang S.Toughened ultra-fine (Ti,W)(C,N)-Ni cermets[J].Scripta Materialia,2005,52(2):129-133. |
| [18] | Fu C T,Li A K,Wu J M.Effects of oxidation of Cr3O2 particulate-reinforced alumina composites on microstructure and mechanical properties[J].Journal of Materials Science,1993,28:6285-6294. |
| [19] | Reimanis I E.A review of issues in the fracture of interfacial ceramics and ceramic composites[J].Materials Science and Engineering A,1997,237(2):159-167. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%