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Title: Exploring hardness enhancement in superhard tungsten tetraboride-based solid solutions using radial X-ray diffraction

In this paper, we explore the hardening mechanisms in WB4-based solid solutions upon addition of Ta, Mn, and Cr using in situ radial X-ray diffraction techniques under nonhydrostatic pressure. By examining the lattice-supported differential strain, we provide insights into the mechanism for hardness increase in binary solid solutions at low dopant concentrations. Speculations on the combined effects of electronic structure and atomic size in ternary WB4 solid solutions containing Ta with Mn or Cr are also included to understand the extremely high hardness of these materials.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1]
  1. UCLA, Los Angeles, CA (United States)
  2. UCLA, Los Angeles, CA (United States); Virginia Commonwealth Univ., Richmond, VA (United States)
Publication Date:
Grant/Contract Number:
NA0002006; AC02-05CH11231; NA-00006
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Carnegie Institution of Washington, Washington, D.C. (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; diamond anvil cell; differential stress; hardness; in situ high-pressure; non-hydrostatic compression; radial diffraction; solid-solution hardening; superhard materials; tungsten tetraboride
OSTI Identifier:
1335839
Alternate Identifier(s):
OSTI ID: 1226779