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Open AccessArticle

Fabrication of Fe-Based Diamond Composites by Pressureless Infiltration

by Meng Li 1,2, Youhong Sun 1,2, Qingnan Meng 1,2, Haidong Wu 1,2, Ke Gao 1,2,* and Baochang Liu 1,2,*
1
College of Construction Engineering, Jilin University, Changchun 130000, China
2
Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Minsitry of Land and Resources, Changchun 130000, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Silvia Gross
Materials 2016, 9(12), 1006; https://doi.org/10.3390/ma9121006
Received: 18 September 2016 / Revised: 6 November 2016 / Accepted: 29 November 2016 / Published: 12 December 2016
(This article belongs to the Section Structure Analysis and Characterization)
A metal-based matrix is usually used for the fabrication of diamond bits in order to achieve favorable properties and easy processing. In the effort to reduce the cost and to attain the desired bit properties, researchers have brought more attention to diamond composites. In this paper, Fe-based impregnated diamond composites for drill bits were fabricated by using a pressureless infiltration sintering method at 970 °C for 5 min. In addition, boron was introduced into Fe-based diamond composites. The influence of boron on the density, hardness, bending strength, grinding ratio, and microstructure was investigated. An Fe-based diamond composite with 1 wt % B has an optimal overall performance, the grinding ratio especially improving by 80%. After comparing with tungsten carbide (WC)-based diamond composites with and without 1 wt % B, results showed that the Fe-based diamond composite with 1 wt % B exhibits higher bending strength and wear resistance, being satisfactory to bit needs. View Full-Text
Keywords: impregnated diamond composites; pressureless infiltration; wear resistance; boron impregnated diamond composites; pressureless infiltration; wear resistance; boron
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MDPI and ACS Style

Li, M.; Sun, Y.; Meng, Q.; Wu, H.; Gao, K.; Liu, B. Fabrication of Fe-Based Diamond Composites by Pressureless Infiltration. Materials 2016, 9, 1006.

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