Mo2C interface layer: effect on the interface strength and cutting performance of diamond/Fe-Ni-WC composites

Xinyue Mao; Qingnan Meng; Mu Yuan; Sifan Wang; Shiyin Huang; Baochang Liu

Journal of Materials Research and Technology (Jul 2023)

Mo2C interface layer: effect on the interface strength and cutting performance of diamond/Fe-Ni-WC composites

Xinyue Mao,
Qingnan Meng,
Mu Yuan,
Sifan Wang,
Shiyin Huang,
Baochang Liu

Affiliations

Xinyue Mao: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China
Qingnan Meng: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China; State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130026, China; Corresponding author. Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China.
Mu Yuan: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China
Sifan Wang: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China
Shiyin Huang: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China
Baochang Liu: Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, College of Construction Engineering, Jilin University, Changchun, 130026, China; State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130026, China

Journal volume & issue: Vol. 25
pp. 2029 – 2039

Abstract

Read online

The weak interfacial strength between Fe-based matrix and diamonds causes diamond particles to fall off prematurely, significantly affecting the cutting efficiency of diamond composites. This work aimed to optimize the interfacial microstructure and mechanical properties of the diamond/Fe-Ni-WC composites by coating a Mo2C layer on the diamond particles. The Mo2C-coated diamonds were prepared via the molten salt method. Diamond/Fe-Ni-WC composites were sintered by the hot-pressing process under a vacuum. The bending strength of composites with Mo2C-coated diamonds was improved from 804 to 996 MPa with the increased coating time. The energy dispersive spectroscopy scanning indicated that the Mo2C coating layer changed the interfacial composition between the matrix and the diamonds from Fe–C alloy to Mo2C, improving the interface strength. Moreover, the diamond protrusion heights of composites were raised by adding a Mo2C interface, resulting in an improvement in the cutting efficiency of impregnated diamond tools.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords