摘要
以金刚石和无机溶胶为原料,采用溶胶-凝胶法制备金刚石/陶瓷结合剂复合粉体,将粉体通过压制、烧结获得金刚石/陶瓷结合剂复合烧结体,利用XRD、SEM、电子万能试验机、洛氏硬度计等对复合烧结体进行性能表征。结果表明:采用溶胶-凝胶法可制备出组织均匀性较好的金刚石/陶瓷结合剂复合粉体,经680℃/2h烧结后试样的抗弯强度、硬度、密度和气孔率分别为58.54MPa,55.8HRB,1.74g/cm^3,24.16%;而采用熔融法所制烧结试样的抗弯强度、硬度、密度和气孔率分别为51.32MPa,72.5HRB,1.92g/cm^3,21.47%。与熔融法制备的金刚石/陶瓷结合剂磨削盘相比,采用溶胶-凝胶法制备的磨削盘结构均匀,磨削加工的TC4钛合金工件表面磨削质量高,工件表面粗糙度为0.051μm。
Based on the diamond and inorganic sol,sol-gel(S-G)method was used to prepare diamond/vitrified bond composite powder and then the bulk samples were obtained after the powder was pressed and sintered,and the bond composite powder was characterized by XRD,SEM,electronic universal testing machine,Rockwell hardness tester,etc.The results show that diamond/vitrified bond composite powder with good uniformity can be prepared by S-G method,and the bending strength,Rockwell hardness,volume density and porosity of samples sintered at 680℃/2h are 58.54MPa,55.8HRB,1.74g/cm^3 and 24.16%,respectively;when these samples were obtained by melting method,the corresponding figures are 51.32MPa,72.5HRB,1.92g/cm^3 and 21.47%,respectively.Compared to the melting method,the microstructure of grinding disc prepared by S-G method is uniform and high quality is observed on the machined surface of TC4 titanium alloy,whose R a reaches 0.051μm.
作者
洪秋
万隆
李建伟
HONG Qiu;WAN Long;LI Jian-wei(College of Materials Science and Engineering,Hunan University,Changsha 410082,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2019年第12期130-135,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51375157)
作者简介
通讯作者:万隆(1956-),男,教授,博士,主要从事磨料磨具方向的研究,联系地址:湖南省长沙市湖南大学材料科学与工程学院(410082),E-mail:wanglong1799@aliyun.com。
