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

by Youhong Sun 1,2,3, Haidong Wu 1,3, Meng Li 1,3, Qingnan Meng 1,3, Ke Gao 1,3, Xiaoshu Lü 1,4 and Baochang Liu 1,2,3,*
1
College of Construction Engineering, Jilin University, Changchun 130000, China
2
State Key Laboratory of Superhard Materials, Changchun 130000, China
3
Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Minsitry of Land and Resources, Changchun 130000, China
4
Department of Civil Engineering, Aalto University, P.O. Box 12100, Espoo FIN-02015, Finland
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Materials 2016, 9(5), 343; https://doi.org/10.3390/ma9050343
Received: 22 March 2016 / Revised: 24 April 2016 / Accepted: 3 May 2016 / Published: 6 May 2016
(This article belongs to the Section Advanced Composites)
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. View Full-Text
Keywords: ZrO2 nanoparticles; metal matrix; hot pressing; diamond impregnated composites; Orowan strengthening ZrO2 nanoparticles; metal matrix; hot pressing; diamond impregnated composites; Orowan strengthening
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Sun, Y.; Wu, H.; Li, M.; Meng, Q.; Gao, K.; Lü, X.; Liu, B. The Effect of ZrO2 Nanoparticles on the Microstructure and Properties of Sintered WC–Bronze-Based Diamond Composites. Materials 2016, 9, 343.

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