Back to results
US 8,207,077 B2Granted
Abrasion-resistant sintered body, sliding member, and pump
AssigneeKYOCERA Corporation
InventorsKunihide Shikata, Teruaki Katagiri
Life of this patent
Estimating the term…
Abstract
The present invention provides a dense, abrasion resistant ceramic. The ceramic of the invention includes alumina crystal particles and a grain boundary phase. The invention also includes an abrasion resistant sliding member and a pump comprising the same.
Claims8
An abrasion-resistant sintered body comprising
- MnTiO3 crystal grains, alumina crystal grains and a grain boundary phase, and having an open porosity of 0.1% or less, the alumina crystal grains comprising:
- a large diameter alumina grain having a grain diameter of 10 μm or more;
- and
- a small diameter alumina grain having a grain diameter of 5 μm or less,
- wherein an area rate of the large diameter alumina grain on a surface of the sintered body is 35% to 65%.
2 more elements
A pump comprising a shaft and a bearing, wherein at least one of the shaft and the bearing comprises a sliding surface that is an abrasion-resistant sintered body comprising alumina crystal grains and a grain boundary phase, and having an open porosity of 0.1% or less, the alumina crystal grains comprising:
- a large diameter alumina grain having a grain diameter of 10 μm or more;
- and
- a small diameter alumina grain having a grain diameter of 5 μm or less,
- wherein an area rate of the large diameter alumina grain on a surface of the sintered body is 35% to 65%.
1 more element
Dependencies are inferred from the claim text.