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Enhanced Mechanical Properties of Machinable LaPO 4 /Al 2 O 3 Composites by Spark Plasma Sintering
Author(s) -
Du Aibing,
Pan Wei,
Ahmad Kaleem,
Shi Suilin,
Qu Zhixue,
Wan Chunlei
Publication year - 2009
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02260.x
Subject(s) - materials science , spark plasma sintering , composite material , fracture toughness , volume fraction , tungsten carbide , composite number , flexural strength , sintering , ceramic , tungsten , metallurgy
LaPO 4 /Al 2 O 3 composites were fabricated by spark plasma sintering. The effects of LaPO 4 contents on the mechanical properties of the composites were investigated. The bending strength and fracture toughness can reach the maximum value of 568.2±30 MPa and 4.8±0.5 MPa·m 1/2 for the composite with 16.4 vol% LaPO 4 addition, respectively. The elastic moduli and hardness of the composites decreased with increasing LaPO 4 content. Furthermore, the experimental results show that the composites can be machined by a tungsten carbide drill as the LaPO 4 volume fraction is higher than 34.4 vol%.