A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD FOR SLIDE MEMBER MADE FROM SILICON NITRIDE SINTERED BODY
To provide a manufacturing method for a slide member made from a silicon nitride sintered body, capable of manufacturing a slide member showing stable durability even if a load is changed.SOLUTION: A manufacturing method related to one embodiment includes: a cracking step of obtaining a raw material blend by cracking and blending a silicon nitride powder, a sintering aid powder, and a binder; a molding step of molding the raw material blend; a degreasing step of obtaining a degreased body by degreasing the molded body; a sintering step of obtaining a silicon nitride sintered body by sintering the degreased body; a step of performing HIP treatment to the silicon nitride sintered body; and a processing step of processing the silicon nitride sintered body into a slide member. The sintering step is performed in a non-oxidative atmosphere and at a sintering temperature of 1650-2000°C. In the sintering step, changes in pressure due to a gas generated from the degreased body is 0.3 MPa or under. In any given 50-μm2 observation region of a specific cross section or surface, the slide member displays a ratio of 0-10% for silicon nitride crystal grains with internal dislocation defects out of any 50 silicon nitride crystal grains with their entire contours visible.SELECTED DRAWING: Figure 1
【課題】負荷が変化したとしても安定した耐久性を示す摺動部材を製造可能な窒化珪素焼結体製摺動部材の製造方法を提供する。【解決手段】実施形態に係る製造方法は、窒化珪素粉末、焼結助剤粉末、及びバインダを解砕及び混合することにより原料混合体を得る解砕工程、原料混合体を成形する成形工程、成形体を脱脂して脱脂体を得る脱脂工程、脱脂体を焼結して窒化珪素焼結体を得る焼結工程、窒化珪素焼結体に対してＨＩＰ処理を行う工程、及び窒化珪素焼結体を摺動部材に加工する加工工程を備える。焼結工程は、非酸化性雰囲気中、焼結温度１６５０～２０００℃で行われる。焼結工程において脱脂体から発生するガスによる圧力の変化が０．３ＭＰａ以下である。摺動部材は、任意の断面又は表面の観察領域５０μｍ２において、全輪郭がみえる任意の５０個の窒化珪素結晶粒子における、内部に転位欠陥部を有する窒化珪素結晶粒子の数の割合が０～１０％である。【選択図】図１
MANUFACTURING METHOD FOR SLIDE MEMBER MADE FROM SILICON NITRIDE SINTERED BODY
To provide a manufacturing method for a slide member made from a silicon nitride sintered body, capable of manufacturing a slide member showing stable durability even if a load is changed.SOLUTION: A manufacturing method related to one embodiment includes: a cracking step of obtaining a raw material blend by cracking and blending a silicon nitride powder, a sintering aid powder, and a binder; a molding step of molding the raw material blend; a degreasing step of obtaining a degreased body by degreasing the molded body; a sintering step of obtaining a silicon nitride sintered body by sintering the degreased body; a step of performing HIP treatment to the silicon nitride sintered body; and a processing step of processing the silicon nitride sintered body into a slide member. The sintering step is performed in a non-oxidative atmosphere and at a sintering temperature of 1650-2000°C. In the sintering step, changes in pressure due to a gas generated from the degreased body is 0.3 MPa or under. In any given 50-μm2 observation region of a specific cross section or surface, the slide member displays a ratio of 0-10% for silicon nitride crystal grains with internal dislocation defects out of any 50 silicon nitride crystal grains with their entire contours visible.SELECTED DRAWING: Figure 1
【課題】負荷が変化したとしても安定した耐久性を示す摺動部材を製造可能な窒化珪素焼結体製摺動部材の製造方法を提供する。【解決手段】実施形態に係る製造方法は、窒化珪素粉末、焼結助剤粉末、及びバインダを解砕及び混合することにより原料混合体を得る解砕工程、原料混合体を成形する成形工程、成形体を脱脂して脱脂体を得る脱脂工程、脱脂体を焼結して窒化珪素焼結体を得る焼結工程、窒化珪素焼結体に対してＨＩＰ処理を行う工程、及び窒化珪素焼結体を摺動部材に加工する加工工程を備える。焼結工程は、非酸化性雰囲気中、焼結温度１６５０～２０００℃で行われる。焼結工程において脱脂体から発生するガスによる圧力の変化が０．３ＭＰａ以下である。摺動部材は、任意の断面又は表面の観察領域５０μｍ２において、全輪郭がみえる任意の５０個の窒化珪素結晶粒子における、内部に転位欠陥部を有する窒化珪素結晶粒子の数の割合が０～１０％である。【選択図】図１
MANUFACTURING METHOD FOR SLIDE MEMBER MADE FROM SILICON NITRIDE SINTERED BODY
窒化珪素焼結体製摺動部材の製造方法
FUNAKI KAI (author) / AOKI KATSUYUKI (author) / YAMAGUCHI HARUHIKO (author) / TAKAO MINORU (author) / ABE YUTAKA (author)
2024-02-08
Patent
Electronic Resource
Japanese
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