Polymer precursor for silicon carbide/aluminum nitride ceramics
    212.
    发明公开
    Polymer precursor for silicon carbide/aluminum nitride ceramics 失效
    Polymere AusgangsstoffefürSiliziumkarbid / Aluminiumnitridkeramiken。

    公开(公告)号:EP0562248A1

    公开(公告)日:1993-09-29

    申请号:EP93101854.3

    申请日:1993-02-05

    CPC classification number: C04B35/571 C04B35/581 C08G77/60 C08G79/00 C08L83/16

    Abstract: A block copolymer is prepared by reacting an aluminum-nitrogen polymer and a silazane polymer at a temperature not greater than 400°C. Block copolymers containing alkenyl or alkynyl groups can be crosslinked by supplying energy to generate free radicals. An AlN/SiC-containing ceramic is formed by pyrolyzing the crosslinked block copolymer in a nonoxidizing atmosphere.

    Abstract translation: 通过使铝 - 氮聚合物和硅氮烷聚合物在不高于400℃的温度下反应来制备嵌段共聚物。含烯基或炔基的嵌段共聚物可以通过提供能量来交联以产生自由基。 通过在非氧化气氛中热解交联的嵌段共聚物来形成含AlN / SiC的陶瓷。

    Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases
    213.
    发明公开
    Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases 失效
    Reaktionsspritzgiessen von Siliciumnitriolkeramiken mit kristallisierten Korngrenzphasen。

    公开(公告)号:EP0560258A2

    公开(公告)日:1993-09-15

    申请号:EP93103687.5

    申请日:1993-03-08

    Abstract: A sintered, Si₃N₄-containing ceramic article is prepared by a reaction injection molding process comprising (1) injecting into a heated mold a fluid, nondilatant mixture of (a) at least 40% by volume of a powder mixture of (i) Si₃N₄, (ii) a silicate glass-forming sintering aid and (iii) a high metal content silicide, and (b) a curable Si₃N₄ precursor binder, to cure the binder and produce a hardened molded article, (2) heating the hardened molded article under a suitable atmosphere to convert the cured binder to a Si₃N₄-containing ceramic, and (3) sintering the molded article under a vacuum to crystallize the silicate glass phase by deoxygenation.

    Abstract translation: 通过反应注射成型方法制备烧结的含Si 3 N 4的陶瓷制品,其包括(1)向加热的模具中注入(a)至少40体积%的(i)Si 3 N 4的粉末混合物的流体,非稀释剂混合物, (ii)硅酸盐玻璃形成烧结助剂和(iii)高金属含量硅化物,和(b)可固化Si 3 N 4前体粘合剂,以固化粘合剂并制备硬化的模制品,(2)将硬化的模制品加热到 将固化的粘合剂转化为含Si 3 N 4的陶瓷的合适气氛,和(3)在真空下烧结成型制品以通过脱氧使硅酸盐玻璃相结晶。

    Silicon nitride ceramics containing crystallized grain boundary phases
    214.
    发明公开
    Silicon nitride ceramics containing crystallized grain boundary phases 失效
    Sinterkörperaus Siliziumnitrid mit kristallinen Korngrenzenphasen。

    公开(公告)号:EP0553719A1

    公开(公告)日:1993-08-04

    申请号:EP93100931.0

    申请日:1993-01-21

    CPC classification number: C04B35/593

    Abstract: A silicon nitride ceramic having crystalline grain boundary phases is prepared by heating a composition comprising silicon nitride, a silicate glass-forming sintering aid and a high metal content transition metal silicide, to a temperature of 1300° to 1800°C under vacuum until a glass forms, oxygen is removed from the glass as SiO gas, and the glass crystallizes. Alternatively, the grain boundaries of a sintered composition comprising silicon nitride, a silicate glass and a high metal content transition metal silicide can be crystallized by heating to at least 1300°C under a vacuum.

    Abstract translation: 通过将包含氮化硅,硅酸盐玻璃形成烧结助剂和高金属含量过渡金属硅化物的组合物在真空下加热到1300℃至1800℃的温度,制备具有晶界相的氮化硅陶瓷,直到玻璃 从玻璃中除去氧气作为SiO气体,玻璃结晶。 或者,包括氮化硅,硅酸盐玻璃和高金属含量的过渡金属硅化物的烧结组合物的晶界可以通过在真空下加热至至少1300℃而结晶。

    MACROCOMPOSITE BODIES AND PRODUCTION METHODS
    216.
    发明公开
    MACROCOMPOSITE BODIES AND PRODUCTION METHODS 失效
    万家乐复合体及其制造方法。

    公开(公告)号:EP0527955A1

    公开(公告)日:1993-02-24

    申请号:EP91912543.0

    申请日:1991-05-09

    CPC classification number: C22C1/1036 B22F2003/1014 C04B35/652 C22C2001/1063

    Abstract: Nouveau procédé de formation de corps macrocomposites par infiltration d'une masse perméable de matières de remplissage ou d'une préforme afin de former un corps composite matriciel en métal et, à l'aide d'un moyen approprié, par liaison dudit corps composite matriciel en métal formé à un autre corps. Dans un mode de réalisation préféré, notamment, une infiltration spontanée a lieu à l'aide d'un activateur d'infiltration et/ou d'un précurseur d'activateur d'infiltration et/ou d'une atmosphère d'infiltration lesquels sont en communication avec une matière de remplissage ou une préforme, au moins à un momnet donné pendant le processus, permettant ainsi à du métal matriciel fondu de s'infiltrer spontanément dns la matière de remplissage ou dans la préforme. Ladite infiltration spontanée a lieu sans application de pression ou de vide.

    Wear resistant ceramic with a high alpha-content silicon nitride phase
    220.
    发明公开
    Wear resistant ceramic with a high alpha-content silicon nitride phase 失效
    AbriebsbeständigeKeramik mit einer Siliciumnitridphase hohen Alpha-Gehalts。

    公开(公告)号:EP0479214A2

    公开(公告)日:1992-04-08

    申请号:EP91116708.8

    申请日:1991-09-30

    CPC classification number: C04B35/584 C04B35/593 C04B35/5935

    Abstract: Disclosed is a wear resistant sintered ceramic product comprising (a) 40-98 weight percent silicon nitride having a high alpha-phase content, (b) 2-60 weight percent of a high metal content, mixed silicide of iron, cobalt or nickel and (c) up to 20 weight percent of at least one oxide, nitride, or silicate of an element of IUPAC groups 2, 3, 4, 13 or the lanthanide series. A method for making such a product is also disclosed.

    Abstract translation: 公开了一种耐磨烧结陶瓷产品,其包含(a)40-98重量%的具有高α相含量的氮化硅,(b)2-60重量%的高金属含量,铁,钴或镍的混合硅化物,以及 (c)至多20重量%的IUPAC组2,3,4,13或镧系元素的元素的至少一种氧化物,氮化物或硅酸盐。 还公开了制造这种产品的方法。

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