公开(公告)号：ZA8706944B

公开(公告)日：1988-03-21

申请号：ZA8706944

申请日：1987-09-16

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： ROBERT CAMPELL KANTNER ,  MICHAEL KEVORK AGHAJANIAN ,  STANISLAV ANTOLIN ,  ALAN SCOTT NAGELBERG ,  RATNESH KUMAR DWIVEDI

IPC: C04B35/622 ,  C04B35/00 ,  C04B35/10 ,  C04B35/65 ,  C22C29/12 ,  C04B ,  B28B ,  C01F ,  G01N

CPC classification number: C04B35/652 ,  C22C29/12

公开(公告)号：ZA876905B

公开(公告)日：1988-03-17

申请号：ZA876905

申请日：1987-09-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： DANNY RAY WHITE ,  MICHAEL KEVORK AGHAJANIAN ,  HARRY RICHARD ZWICKER

IPC: C04B35/622 ,  B28B1/00 ,  B28B3/02 ,  B28B7/34 ,  C04B35/10 ,  C04B35/65 ,  C04B38/00 ,  C04B38/06 ,  C22C29/12 ,  C04B ,  C01B ,  B28B

Abstract: A method is provided for producing a self-supporting ceramic body comprising a polycrystalline material comprised of the oxidation reaction product of a parent metal (10) and having therein one or more channels which inversely replicate the geometry of a configured fugitive metal (6). The method includes providing an assembly of the configured fugitive metal (6) and the parent metal (10), optionally including a bed of permeable filler (4), and heating the assembly to form a body of molten parent metal. The molten parent metal is oxidized under selected conditions to grow the polycrystalline material to engulf the configured fugitive metal (6) (and to infiltrate the filler (4), if the filler (4) is present) and to cause the fugitive metal (6) to disperse into the engulfing polycrystalline material thereby leaving behind as the one or more channels the space formerly occupied by the configured fugitive metal (6). The method provides self-supporting ceramic bodies having therein one or more channels inversely replicating the shape of the configured fugitive metal (6).

公开(公告)号：ZA8706905B

公开(公告)日：1988-03-17

申请号：ZA8706905

申请日：1987-09-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： DANNY RAY WHITE ,  MICHAEL KEVORK AGHAJANIAN ,  HARRY RICHARD ZWICKER

IPC: C04B35/622 ,  B28B1/00 ,  B28B3/02 ,  B28B7/34 ,  C04B35/10 ,  C04B35/65 ,  C04B38/00 ,  C04B38/06 ,  C04B ,  B28B ,  C01B

CPC classification number: B28B3/025 ,  B28B1/00 ,  B28B7/342 ,  C04B35/652 ,  C04B38/061 ,  C04B35/00 ,  C04B38/0051 ,  C04B38/007 ,  C04B38/065 ,  C04B38/069 ,  C04B41/5025

公开(公告)号：ZA876944B

公开(公告)日：1988-03-21

申请号：ZA876944

申请日：1987-09-16

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： ROBERT CAMPELL KANTNER ,  MICHAEL KEVORK AGHAJANIAN ,  STANISLAV ANTOLIN ,  ALAN SCOTT NAGELBERG ,  RATNESH KUMAR DWIVEDI

IPC: C04B35/622 ,  C04B35/00 ,  C04B35/10 ,  C04B35/65 ,  C22C29/12 ,  C04B ,  G01N ,  B28B ,  C01F

Abstract: A ceramic body is formed of alumina obtd. by oxidn. of molten aluminium with an oxygen-contg. gas under such conditions that the product remains in contact with the metal to form a body through which metal is continuously drawn to the oxidant interface to cause growth of the body. The body may also include non-oxidised metal components. - The body is caused to have a refined microstructure by including a process modifier either in the molten metal or in contact with it. - In a modification a body of filler is located adjacent to the metal bath so that it becomes embedded in the oxidn. product. Pref. the modifier is Cu, Ni, Fe, Zr, Cr, Ti, W, Nb or Co. - The modifier is pref. used in an amt. of 0.1-10 wt.% based on the aluminium metal. It may be alloyed with the latter, applied as a powder to the growth surface of the initial aluminium body, or mixed with the filler, which may be silicon carbide. (Dwg.0/3)