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Sintering and Properties of Titanium Diboride Made from Powder Synthesized in a Plasma‐Arc Heater
Author(s) -
BAUMGARTNER H.R.,
STEIGER R. A.
Publication year - 1984
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.1151-2916.1984.tb19744.x
Subject(s) - materials science , titanium diboride , sintering , zirconium diboride , titanium , plasma , magnesium diboride , grain boundary , metallurgy , composite material , electrical resistivity and conductivity , electric arc , microstructure , condensed matter physics , critical current , ceramic , chemistry , superconductivity , physics , engineering , electrode , quantum mechanics , electrical engineering
The pressureless sintering to near theoretical density of high‐purity titanium diboride powder, produced in a plasma arc from halogen vapor reactants, is described. Physical and mechanical property measurements between 25° and 1400°C are reported for materials densified at T=1800° to 2275°C. Titanium diboride exhibits several unusual and interesting properties, which include high electronic conductivity, a large positive strength‐vs‐temperature coefficient, and an intrinsic resistance to high‐temperature slow crack growth (negative N ) Property trends are explained in terms of microstructural development and residual grain‐boundary stresses.