金刚石粒度和含量对自蔓延高温合成NiAl结合金刚石复合材料性能的影响  

Effect of diamond particle size and content on properties of NiAl-bonded diamond composites prepared by self-propagating high temperature synthesis

作　　者：彭凯 杨潘 尹育航[1] 陶洪亮 马邵伟 段锋 肖国庆[2] 丁冬海[2] 张立 PENG Kai;YANG Pan;YIN Yu-hang;TAO Hong-liang;MA Shao-wei;DUAN Feng;XIAO Guo-qing;DING Dong-hai;ZHANG Li(Monte-Binaco Diamond Applications Co Ltd,Foshan 528313,China;College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Huaqing College,Xi’an University of Architecture and Technology,Xi’an 710043,China)

机构地区：[1]广东奔朗新材料股份有限公司,广东佛山528313 [2]西安建筑科技大学材料科学与工程学院,陕西西安710055 [3]西安建筑科技大学华清学院,陕西西安710043

出　　处：《材料热处理学报》2023年第7期31-38,共8页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51772236);陕西本科和高等继续教育教学改革研究项目(21BY196);西安建筑科技大学华清学院专项项目(22KY02)。

摘　　要：以Ni粉、Al粉、金刚石为原料,采用自蔓延高温合成法制备了NiAl结合金刚石复合材料,研究了金刚石的粒度和含量对Ni-Al体系燃烧温度和燃烧波蔓延速度的影响以及对复合材料性能的影响。结果表明:金刚石降低了Ni-Al体系的燃烧温度和燃烧波蔓延速度,并提高NiAl基体的抗压强度和维氏硬度。但随着金刚石含量的增加,复合材料的力学性能有所下降,NiAl峰升高,Ni_(3)Al峰下降。随着金刚石的粒度降低,Ni-Al体系的燃烧温度先降低后升高,燃烧波蔓延速度则是先增大后减小,复合材料的抗压强度先升高后降低,维氏硬度降低,Ni_(3)Al峰先升高后降低,NiAl和Ni峰则是先降低后升高。当金刚石含量为10 mass%、粒度为150~180μm时,复合材料的综合性能最佳,体积密度为3.28 g/cm^(3),抗压强度为92.0 MPa,维氏硬度为122.06 HV,Ni3Al峰达到最高。NiAl-bonded diamond composites were prepared by self-propagating high temperature synthesis method using Ni powder,Al powder and diamond as raw materials.The effects of diamond particle size and content on the combustion temperature and combustion wave propagation velocity of the Ni-Al system,as well as the properties of the composites,were studied.The results show that the diamond reduces the combustion temperature and combustion wave propagation velocity of the Ni-Al system,and increases the compressive strength and Vickers hardness of the NiAl matrix.However,with the increase of diamond content,the mechanical properties of the composites decrease,with the NiAl peak increasing and the Ni_(3)Al peak decreasing.With the particle size of diamond decreases,the combustion temperature of the Ni-Al system first decreases and then increases,the combustion wave propagation velocity first increases and then decreases,the compressive strength of the composites first increases and then decreases,the Vickers hardness decreases,the Ni_(3)Al peak first increases and then decreases,while the NiAl and Ni peaks first decrease and then increase.When the diamond content is 10 mass% and the particle size is 150-180μm,the composites have the best comprehensive performance,with the volume density of 3.28 g/cm^(3),the compressive strength of 92.0 MPa,the Vickers hardness of 122.06 HV,and the Ni_(3)Al peak reaching its highest.

关 键 词：自蔓延高温合成法 燃烧温度 燃烧波蔓延速度 金刚石工具 Ni-Al体系 

分 类 号：TB333[一般工业技术—材料科学与工程]