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Rapid densification of yttria (Y2O3) ceramics without sintering aids via spark plasma sintering at relatively low temperature of 1300 • C for 40 minutes at two-step pressure profile, followed by post-annealing at 1050 • C for 6 hours in air was attempted. Effect of preload pressure on microstructure, Vickers hardness, fracture toughness and optical in-line transmittance was investigated. Densification during spark plasma sintering did not involve any phase transformation and all phases havedoi:10.12693/aphyspola.131.460 fatcat:z2z7ijay7bflllomcqzwqcl5ba