アルミナの摺動摩耗特性に対するホットプレス温度の効果

概要

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The friction and wear properties of alumina hot-pressed at various temperatures were measured with a pin-on-disk tester, and their abrasion wear was measured against fixed diamond grains. The bulk density of hot-pressed alumiua reached almost theoretical at 1400℃, above which temperature the glain growth was extensive. The fracture toughness increased with increasing hot-pressing temperature, but the Vickers hardness showed a maximum at 1400°-1500℃, and then slightly decreased. The coefficient of friction and specific wear rate measured on the hot-pressed silicon carbide disk were fairly high for 1200 'C-alumina, minimum at 1300°-1500℃, and then increased gradually with increasing hot-pressing temperature. The specific wear rate of abrasion wear against fixed diamond grains was about a hundred times greater than that against silicon carbide, but the dependence on the hot-pressing temperature was similar. The negative correlation was confirmed between the hardness and the specific wear rate of hot-pressed alumina, which is a well-known relation for abrasion wear.
社団法人日本セラミックス協会の論文
1988-02-01