Kyocera Corporation

Mieko Yashima

Yuusaku Ishimine

Shinya Kawai

Kazuhiro Ishikawa

Tatsuji Furuse

Yusaku Ishimine

Kouji Yamamoto

Mami Iida

Disclosed are a silicon carbide sintered body and a sliding component using the same, and a protective body which, even when fine cracks are generated due to thermal shock or mechanical impact over prolonged use, are capable of inhibiting development of the cracks. The silicon carbide sintered body contains silicon carbide grains as a major component and has a relative density of 95% or more. On an observation surface of the silicon carbide sintered body, coarse silicon carbide grainshaving a surface area of 170 &#x3bc;mor more occupy 6 area % or more and 15 area % or less. The silicon carbide sintered body has excellent mechanical properties such as strength and rigidity. Even when fine cracks are generated due to thermal shock or mechanical impact, coarse silicon carbide grainsare capable of inhibiting development of the cracks.

Silicon carbide sintered body and sliding component using the same, and protective body

Provided are a sliding component, such as a mechanical seal ring, which is capable of maintaining superior sliding characteristics even in the long-term continuous use thereof, as well as a mechanical seal, a faucet valve, and a rolling support device, each of which includes the sliding component. The sliding component includes a stationary member, and a movable member contactedly sliding on the stationary member. The stationary member and the movable member are respectively composed of a silicon carbide sintered body containing graphite. The content of the graphite in one of the stationary member and the movable member is at least 4% by mass greater than in the other. Thus, the sliding component includes the stationary member and the movable member which are a combination of those having different contents of graphite. Owing to a high lubricating effect, the superior sliding characteristics can be maintained, permitting a long-term continuous sliding.

Sliding part, mechanical seal, faucet valve, and rolling support device each including the sliding part

Provided is a sliding member which includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of 10 &#x3bc;m to 150 &#x3bc;m. A ratio of the number of open pores having the overlapping degree of 10% or more between the opening portions is 3% or less. Another sliding member includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of not less than 10 &#x3bc;m nor more than 78 &#x3bc;m. A coefficient of variation of the opening portions satisfies the following equation: 1.03&#x2266;&#x221a;V/X&#x2266;1.51 where &#x221a;V is a standard deviation of circle equivalent diameters, and X is an average value of the circle equivalent diameters. A mechanical seal ring, a mechanical seal and a faucet valve each using the sliding member are also provided.

Sliding member, mechanical seal ring, mechanical seal and faucet valve

A laminate includes a first green sheet and a second green sheet. The first green sheet includes a first glass including Al and M which is at least one of Sr and Ba. A relationship between Al content and M content is so defined that a position represented by percent by mass of Al in terms of AlOand percent by mass of M in terms of MO on a coordinate system are on or in a range defined by straight lines connecting point A (1, 21), point B (1, 35), point C (9, 45), point D (20, 45), point E (20, 35), and point F (9, 21) on the coordinate system. The second green sheet includes a second glass including Si and B. The first green sheet is integrally laminated with the second green sheet.

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Kirishima, Japan

Mieko Yashima