公开(公告)号：EP0193292A2

公开(公告)日：1986-09-03

申请号：EP86300739.9

申请日：1986-02-04

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： Newkirk, Marc Stevens ,  Zwicker, Harry Richard ,  Urquhart, Andrew W. ,  Lesher Harold Daniel

IPC: C04B35/65

CPC classification number: C04B41/009 ,  C04B35/652 ,  C04B35/76 ,  C04B35/80 ,  C04B41/5025 ,  C04B41/87 ,  C04B41/4505 ,  C04B35/00 ,  C04B35/65 ,  C04B30/02 ,  C04B38/00

Abstract: A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum and optionally containing therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable vapor-phase oxidant. Within a certain temperature region and optionally aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure.

公开(公告)号：EP0155831A2

公开(公告)日：1985-09-25

申请号：EP85301820.8

申请日：1985-03-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： Newkirk, Marc Stevens ,  Dizio, Steven Frank

IPC: C04B35/71 ,  C04B35/65

CPC classification number: C04B35/10 ,  C04B35/652 ,  C22C29/12

Abstract: Novel self-supporting oxide ceramic materials are produced by the reaction of a molten metal with a vapor phase oxidizing environment using a novel oxidation mechanism. The process is practiced by creating conditions under which the molten is drawn into and through the oxide reaction product to cause continued growth of oxide at the oxide/ atmosphere interface. Under the special conditions of the process invention, molten metal is transported along certain of the intersections of the oxide crystallites by virtue of a preferred wetting phenomenon, such that interconnected channels of the liquid metal are formed where grain boundaries of relatively high surface energy would otherwise occur in the oxide. The resulting novel ceramic product consists of an oxide phase which is interconnected largely through relatively low energy grain boundaries and a metal phase (or porosity in place of the metal phase) also at least partially interconnected.

Abstract translation: 新型自支撑氧化物陶瓷材料通过熔融金属与气相氧化环境的反应使用新的氧化机理产生。 该方法通过产生熔融物被吸入并通过氧化物反应产物以在氧化物气氛界面处继续生长氧化物的条件来实施。 在本发明的特殊条件下，由于优选的润湿现象，熔融金属沿着某些氧化物微晶的交点传送，从而形成液态金属的互连通道，否则将形成相对高的表面能的晶界 发生在氧化物中。 所得到的新型陶瓷产品由氧化物相组成，氧化物相通过相对较低的能量晶界和金属相（或代替金属相的孔隙）也至少部分相互连接。