纳米SiO_2/环氧树脂金刚石磨块的制备与性能  

Preparation and properties of nano-SiO_2/epoxy resin diamond whetstone

作　　者：王俊沙[1] 万隆[1] 胡伟达[1] 翟浩冲[1] 王志起[1] 韩雪[1] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082

出　　处：《复合材料学报》2012年第3期134-139,共6页Acta Materiae Compositae Sinica

基　　金：国家重大科技专项(2010ZX041012-072)

摘　　要：以液态环氧树脂为结合剂、金刚石为磨料、纳米SiO2为增强材料,采用浇注法制备了金刚石磨块,并研究了其性能。结果表明:促进剂与成型料的总质量比0.25%、固化工艺为130℃/4h+160℃/2h时,磨块可获得较好的固化效果;金刚石表面经过硅烷偶联剂或镀Ni处理均可提高磨块的耐磨性,磨削比分别提高15.0%和32.5%;添加经硅烷偶联剂改性后的纳米SiO2可均匀分散于磨块体系中,起到质点增强的作用,且其质量分数为4%时,磨块的抗弯强度和洛氏硬度最大,分别达到106MPa和HRB 56。Using liquid epoxy resin as the bond, diamond as the abrasive and nano-SiO2 as the reinforcement, diamond whetstones were prepared by casting process, and the properties were studied. The results show that with the addition of 0. 25% mass ratio of accelerant to molding compound, whetstones can be cured at 130 ℃/4 h＋ 160 ℃/2 h. As diamond modified by silane coupling agent and Ni-coated, the wear resistance of whetstone is improved by 15.0% and 32.5%, respectively. Nano-SiO2 modified by silane coupling agent is homodispersed in the whetstone, and the bend strength of whetstone can be improved. While the mass fraction of nano-SiO2 is 4%, the flexural strength and Rockwell hardness reach the maximum, i. e. 106 MPa and HRB 56, respectively.

关 键 词：性能 环氧树脂 金刚石磨块 纳米SIO2 浇注 

分 类 号：TB332[一般工业技术—材料科学与工程]