烧结工艺对碳纳米管/羟基磷灰石复合材料力学性能与微观结构的影响(英文)  

Influence of Sintering Technique on Mechanical Properties and Microstructure of CNTs/HAp Composite

作　　者：李爱民[1] 孙康宁[1] 董维芳[2] 尹衍升 王昕[1] 

机构地区：[1]山东大学液态结构及其遗传性教育部重点实验室 [2]山东轻工业学院轻化与环境工程系

出　　处：《人工晶体学报》2004年第4期624-628,共5页Journal of Synthetic Crystals

基　　金：theNationalNaturalScienceFoundationofChina (30 1 70 2 69)and 863Program (2 0 0 3AA30 2 2 32 )

摘　　要：本文主要研究了不同烧结工艺对碳纳米管 /羟基磷灰石复合材料力学性能与微观结构的影响。力学性能测试结果显示 ,在真空气氛下烧结的复合材料力学性能在总体上要高于Ar或N2 气氛保护下烧结所得复合材料 ,断裂韧性的提高幅度最大 ,其最高值达到了 2 .2MPa·m1/ 2 ,远高于纯羟基磷灰石。XRD及IR研究发现 ,所制备复合材料纯度高 ,无其它杂质。SEM观察发现 ,110 0℃ ,真空下所得复合材料的致密性高 ,晶粒细 ,但碳纳米管管径增大 ;而Ar或N2 气氛保护下所得复合材料中碳纳米管容易以原始形态保存 ,但孔隙率高 ,晶粒粗。In this paper, the influence of different sintering technique on mechanical properties and microstructure of CNTs/HAp composite was studied. The mechanical properties of CNTs/HAp composite sintered in vacuum is more higher than that in Ar or N_2. The increasing range of fracture toughness is the biggest. The maximum is 2.2 MPa·m^(1/2) which is higher than that of the pure hydroxyapatite. We found that the composite is very pure by XRD and IR. After sintered in vacuum at 1100℃, CNTs/HAp composite has less pore and more thin grain , at the same time, the diameter of CNTs will be enlarged. After sintered in Ar or N_2 at 1100℃,the CNTs in composite can easily be preserved in its primitive shape but the composite is more porous and grains are bigger.

关 键 词：烧结工艺 碳纳米管/羟基磷灰石复合材料 力学性能 微观结构 

分 类 号：TB332[一般工业技术—材料科学与工程]