Ceramic-metal composite and method to form said composite
    18.
    发明授权
    Ceramic-metal composite and method to form said composite 有权
    陶瓷 - 金属复合材料和形成所述复合材料的方法

    公开(公告)号:US06296045B1

    公开(公告)日:2001-10-02

    申请号:US09133109

    申请日:1998-08-12

    Abstract: A ceramic-metal composite that is tough and stiff has been prepared and is comprised of an inert ceramic (e.g., alumina) embedded and dispersed in a matrix comprised of a metal (e.g., aluminum), a reactive ceramic (e.g., boron carbide) and a reactive ceramic-metal reaction product (e.g., AlB2, Al4BC, Al3B48C2, AlB12, Al4C3, AlB24C4 or mixtures thereof) wherein grains of the inert ceramic have an average grain size greater than or equal to the average grain size of grains of the reactive ceramic. The ceramic-metal composite may be prepared by forming a mixture comprised of an inert ceramic powder (e.g., alumina) and a reactive ceramic powder (e.g., boron carbide), the inert ceramic powder having an average particle size equal to or greater than the average particle size of the reactive ceramic powder, forming the mixture into a porous body and consolidating the porous body in the presence of a metal (e.g., aluminum) to form the ceramic-metal composite.

    Abstract translation: 已经制备了韧性和刚性的陶瓷 - 金属复合材料,其包括嵌入和分散在由金属(例如铝),反应性陶瓷(例如碳化硼)组成的基体中的惰性陶瓷(例如氧化铝) 和反应性陶瓷 - 金属反应产物(例如,AlB2,Al4BC,Al3B48C2,AlB12,Al4C3,AlB24C4或其混合物),其中惰性陶瓷的晶粒的平均晶粒尺寸大于或等于晶粒的平均晶粒尺寸 活性陶瓷。 陶瓷 - 金属复合材料可以通过形成由惰性陶瓷粉末(例如氧化铝)和反应性陶瓷粉末(例如碳化硼)组成的混合物来制备,惰性陶瓷粉末的平均粒度等于或大于 反应性陶瓷粉末的平均粒度,将混合物形成多孔体,并在金属(例如铝)的存在下固化多孔体以形成陶瓷 - 金属复合材料。

    Sintered self-reinforced silicon nitride
    20.
    发明授权
    Sintered self-reinforced silicon nitride 失效
    烧结自增强氮化硅

    公开(公告)号:US5312785A

    公开(公告)日:1994-05-17

    申请号:US63587

    申请日:1993-05-18

    CPC classification number: C04B35/806 C04B35/584 C04B35/5935

    Abstract: A dense, self-reinforced silicon nitride ceramic body and a method of making such body. The body has a composition that includes: (a) silicon nitride; (b) a glassy grain boundary phase containing oxygen, nitrogen, magnesium, yttrium, silicon, zirconium, and at least one of titanium and aluminum; and (c) a second crystalline phase containing zirconium oxide; and (d) crystalline phases of metal zirconium silicide and/or metal zirconium silicon nitride. The ceramic exhibits high fracture toughness and high fracture strength and has a density at least 98 percent of theoretical.

    Abstract translation: 一种致密的自增强氮化硅陶瓷体及其制造方法。 身体的组成包括:(a)氮化硅; (b)含有氧,氮,镁,钇,硅,锆和钛和铝中的至少一种的玻璃态晶界相; 和(c)含有氧化锆的第二结晶相; 和(d)金属硅化锆和/或金属氮化硅锆的结晶相。 该陶瓷具有高断裂韧性和高断裂强度,其密度至少为理论值的98%。

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