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.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
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)
