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Titanium Diboride–Tungsten Diboride Solid Solutions Formed by Induction‐Field‐Activated Combustion Synthesis
Author(s) -
Shibuya Masachika,
Kawata Makoto,
Ohyanagi Manshi,
Munir Zuhair A.
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03361.x
Subject(s) - titanium diboride , materials science , spark plasma sintering , boron , tungsten , solid solution , relative density , titanium , stoichiometry , combustion , lattice constant , impurity , analytical chemistry (journal) , sintering , chemical engineering , nuclear chemistry , metallurgy , chemistry , ceramic , organic chemistry , diffraction , engineering , physics , optics
Solid solutions of titanium diboride–tungsten diboride (TiB 2 –WB 2 ) were synthesized by induction‐field‐activated combustion synthesis (IFACS) using elemental reactants. In sharp contrast to conventional methods, solid solutions could be formed by the IFACS method within a very short time, ∼2 min. Solutions with compositions ranging from 40–60 mol% WB 2 were synthesized with a stoichiometric ratio (Ti + W)/B =½; however, samples with excess boron were also made to counter the loss of boron by evaporation. The dependence of the lattice constants of the resulting solid solutions on composition was determined. The “a” parameter decreased only slightly with an increase in the WB 2 content, whereas the “c” parameter exhibited a significant decrease over the range 40–60 mol% WB 2 . Solid‐solution powders formed by the IFACS method were subsequently sintered in a spark plasma sintering (SPS) apparatus. After 10 min at 1800°C, the samples densified to relative density 86%. XRD analysis showed the presence of only the solid‐solution phase.