A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SILICON NITRIDE SINTERED BODY AND ABRASION RESISTANT MEMBER USING THE SAME
PROBLEM TO BE SOLVED: To provide a silicon nitride sintered body high in chemical resistance to acid, alkali or the like.SOLUTION: There is provided silicon nitride sintered body having silicon nitride crystal particles 1 and a grain boundary phase 2, where the grain boundary phase 2 contains no rare earth element and has area ratio of the grain boundary phase 2 per unit area of 20 μm×20 μm of 10 to 20% when taking a picture of any cross section of the silicon nitride sintered body. There is particle containing one kind of 4A group element selected from Ti, Zr and Hf in the grain boundary phase 2 and the particle exists as a single body of a compound of oxide, nitride, hydride or carbide of 4A group element, a major axis is preferably 2 μm or less, there is preferably 1 to 5 particles containing the elements per unit area of 20 μm×20 μm, and Si and 2A group element form preferably no solid solution in the particle.SELECTED DRAWING: Figure 1
【課題】酸やアルカリ等への耐薬品性の高い窒化珪素焼結体の提供。【解決手段】窒化珪素結晶粒子１と粒界相２を具備する窒化珪素焼結体の任意の断面を撮影したとき、粒界相２は希土類元素を含まず、単位面積２０μｍ×２０μｍあたり粒界相２の面積比が１０〜２０％である窒化珪素焼結体。粒界相２に、Ｔｉ、Ｚｒ、Ｈｆから選ばれる１種の４Ａ族元素を含む粒子が存在し、当該粒子が４Ａ族元素の酸化物、窒化物、水素化物又は炭化物の化合物の単体で存在し、当該粒子の長径が２μm以下であることが好ましく、単位面積２０μｍ×２０μｍあたり、当該元素を含む粒子が１〜５個存在することが好ましく、当該粒子にはＳｉ及び２Ａ族元素が固溶していないことが好ましい窒化珪素焼結体。【選択図】図１
SILICON NITRIDE SINTERED BODY AND ABRASION RESISTANT MEMBER USING THE SAME
PROBLEM TO BE SOLVED: To provide a silicon nitride sintered body high in chemical resistance to acid, alkali or the like.SOLUTION: There is provided silicon nitride sintered body having silicon nitride crystal particles 1 and a grain boundary phase 2, where the grain boundary phase 2 contains no rare earth element and has area ratio of the grain boundary phase 2 per unit area of 20 μm×20 μm of 10 to 20% when taking a picture of any cross section of the silicon nitride sintered body. There is particle containing one kind of 4A group element selected from Ti, Zr and Hf in the grain boundary phase 2 and the particle exists as a single body of a compound of oxide, nitride, hydride or carbide of 4A group element, a major axis is preferably 2 μm or less, there is preferably 1 to 5 particles containing the elements per unit area of 20 μm×20 μm, and Si and 2A group element form preferably no solid solution in the particle.SELECTED DRAWING: Figure 1
【課題】酸やアルカリ等への耐薬品性の高い窒化珪素焼結体の提供。【解決手段】窒化珪素結晶粒子１と粒界相２を具備する窒化珪素焼結体の任意の断面を撮影したとき、粒界相２は希土類元素を含まず、単位面積２０μｍ×２０μｍあたり粒界相２の面積比が１０〜２０％である窒化珪素焼結体。粒界相２に、Ｔｉ、Ｚｒ、Ｈｆから選ばれる１種の４Ａ族元素を含む粒子が存在し、当該粒子が４Ａ族元素の酸化物、窒化物、水素化物又は炭化物の化合物の単体で存在し、当該粒子の長径が２μm以下であることが好ましく、単位面積２０μｍ×２０μｍあたり、当該元素を含む粒子が１〜５個存在することが好ましく、当該粒子にはＳｉ及び２Ａ族元素が固溶していないことが好ましい窒化珪素焼結体。【選択図】図１
SILICON NITRIDE SINTERED BODY AND ABRASION RESISTANT MEMBER USING THE SAME
窒化珪素焼結体およびそれを用いた耐摩耗性部材
FUNAKI KAI (author)
2016-04-28
Patent
Electronic Resource
Japanese
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