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

In this work, we explore the hardening mechanisms in WB{sub 4}-based solid solutions upon addition of Ta, Mn, and Cr using in situ radial X-ray diffraction techniques under non-hydrostatic 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 WB{sub 4} solid solutions containing Ta with Mn or Cr are also included to understand the extremely high hardness of these materials.
Authors:
;  [1] ;  [1] ;  [2] ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095 (United States)
  2. (United States)
  3. (CNSI), UCLA, Los Angeles, California 90095 (United States)
  4. Department of Earth, Planetary, and Space Sciences, UCLA, Los Angeles, California 90095 (United States)
Publication Date:
OSTI Identifier:
22486375
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRONIC STRUCTURE; HARDENING; HARDNESS; MATERIALS; SOLID SOLUTIONS; STRAINS; TUNGSTEN; X-RAY DIFFRACTION