ZrO₂纳米颗粒对烧结WC-青铜基金刚石复合材料微观结构及性能的影响

The Effect of ZrO₂ Nanoparticles on the Microstructure and Properties of Sintered WC-Bronze-Based Diamond Composites.

作者信息

Sun Youhong, Wu Haidong, Li Meng, Meng Qingnan, Gao Ke, Lü Xiaoshu, Liu Baochang

机构信息

College of Construction Engineering, Jilin University, Changchun 130000, China.

State Key Laboratory of Superhard Materials, Changchun 130000, China.

出版信息

Materials (Basel). 2016 May 6;9(5):343. doi: 10.3390/ma9050343.

DOI:10.3390/ma9050343

PMID:28773469

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5503043/

Abstract

Metal matrix-impregnated diamond composites are widely used in diamond tool manufacturing. In order to satisfy the increasing engineering requirements, researchers have paid more and more attention to enhancing conventional metal matrices by applying novel methods. In this work, ZrO₂ nanoparticles were introduced into the WC-bronze matrix with and without diamond grits via hot pressing to improve the performance of conventional diamond composites. The effects of ZrO₂ nanoparticles on the microstructure, density, hardness, bending strength, and wear resistance of diamond composites were investigated. The results indicated that the hardness and relative density increased, while the bending strength decreased when the content of ZrO₂ nanoparticles increased. The grinding ratio of diamond composites increased significantly by 60% as a result of nano-ZrO₂ addition. The enhancement mechanism was discussed. Diamond composites showed the best overall properties with the addition of 1 wt % ZrO₂ nanoparticles, thus paving the way for further applications.

摘要

金属基浸渍金刚石复合材料广泛应用于金刚石工具制造。为了满足不断增长的工程需求，研究人员越来越关注通过应用新方法来增强传统金属基体。在这项工作中，通过热压将ZrO₂纳米颗粒引入含有和不含金刚石磨粒的WC-青铜基体中，以提高传统金刚石复合材料的性能。研究了ZrO₂纳米颗粒对金刚石复合材料的微观结构、密度、硬度、弯曲强度和耐磨性的影响。结果表明，随着ZrO₂纳米颗粒含量的增加，硬度和相对密度增加，而弯曲强度降低。由于添加了纳米ZrO₂，金刚石复合材料的磨削比显著提高了60%。讨论了增强机理。添加1 wt%ZrO₂纳米颗粒时，金刚石复合材料表现出最佳的综合性能，从而为进一步应用铺平了道路。