Is the hardness of material harder than diamond reliable?

doi:10.1016/j.jmst.2022.10.018

J. Mater. Sci. Technol. ›› 2023, Vol. 144: 111-117.DOI: 10.1016/j.jmst.2022.10.018

• Research Article • Previous Articles Next Articles

Is the hardness of material harder than diamond reliable?

Jin Liu^a,b,c,1, Yongtao Zou^d,1, Guodong David Zhan^e, Pei Wang^c, Xiaozhi Yan^c, Duanwei He^a,*, Liping Wang^c,*

^aInstitute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
^bSchool of Mechanical Engineering, Jingchu University of Technology, Jingmen 448000, China;
^cAcademy for Advanced Interdisciplinary Studies, and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
^dShenzhen Key Laboratory of Ultraintense Laser & Advanced Material Technology, College of Engineering Physics, and Center for Advanced Material Diagnostic Technology, Shenzhen Technology University, Shenzhen 518118, China;
^eDrilling Technology Division, Exploration and Petroleum Engineering Center - Advanced Research Center (EXPEC ARC), Saudi Aramco, Dhahran 31311, Saudi Arabia

Received:2022-08-26 Revised:2022-10-05 Accepted:2022-10-16 Published:2023-05-01 Online:2022-11-24
Contact: * E-mail addresses: guodong.zhan@aramco.com (G.D. Zhan), duanweihe@scu.edu.cn (D. He), wanglp3@sustech.edu.cn (L. Wang) .
About author:¹ These authors contributed equally to this work.

Abstract

Abstract: With the development of new synthesis methods and chemistries, a number of new superhard materials have been reported to be harder than diamond. While such materials are highly desirable due to their wide-ranging applications, there are some inherent uncertainties in the methods utilized to determine and define the hardness of such materials. In this paper, we employed the standard Vickers diamond indenter and substitute indenters with the same shape to measure the hardness of nine ceramics and superhard materials within well-defined criteria and methodology, for the assessment of consistency in the hardness testing. The findings and the developed testing method in the current study have broad implications in characterizing new and emerging superhard materials, leading to new discoveries.

Key words: Vickers hardness, Superhard materials, Emerging materials, Applicability

Jin Liu, Yongtao Zou, Guodong David Zhan, Pei Wang, Xiaozhi Yan, Duanwei He, Liping Wang. Is the hardness of material harder than diamond reliable?[J]. J. Mater. Sci. Technol., 2023, 144: 111-117.

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Is the hardness of material harder than diamond reliable?

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