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Pressureless Sintering of Tantalum Carbide Ceramics without Additives
Author(s) -
Liu JiXuan,
Kan YanMei,
Zhang GuoJun
Publication year - 2010
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.1551-2916.2009.03437.x
Subject(s) - materials science , tantalum carbide , ceramic , microstructure , sintering , particle size , tantalum , particle size distribution , grain size , relative density , carbide , composite material , particle (ecology) , metallurgy , boron carbide , silicon carbide , grain growth , chemical engineering , engineering , geology , oceanography
Using fine tantalum carbide (TaC) powder with narrow particle‐size distribution, monolithic TaC ceramics with a relative density of 97.5% was obtained by pressureless sintering at 2300°C without adding additives. The monolithic TaC ceramics had a very fine microstructure with grain size of about 2 μm. It is considered that the small particle size and uniform particle‐size distribution of TaC powder are important factors for preparing dense TaC ceramics with fine microstructure. Otherwise, fast grain growth of TaC will occur. Compared with the reported values in literature, the monolithic TaC ceramics obtained demonstrated a high bending strength of 338±10 MPa.