公开(公告)号：ZA8706910B

公开(公告)日：1988-03-17

申请号：ZA8706910

申请日：1987-09-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： MARC STEVENS NEWKIRK

IPC: B01F7/02 ,  C01F7/42 ,  C01F7/46 ,  C04B35/10 ,  C04B35/622 ,  C04B35/65 ,  C01F ,  C04B

CPC classification number: C01F7/46 ,  C01F7/422 ,  C04B35/652

公开(公告)号：ZA8706904B

公开(公告)日：1988-03-17

申请号：ZA8706904

申请日：1987-09-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP ,  ALCAN INTERNATIONAL LIMITED

Inventor： EUGENE SANGMOO PARK ,  STEVEN DOUGLAS POSTE ,  CHRISTOPHER ROBIN KENNEDY

IPC: B01D20060101 ,  B28B20060101 ,  B32B18/00 ,  C01B20060101 ,  C04B20060101 ,  C04B14/00 ,  C04B35/74 ,  C04B38/02 ,  C04B ,  B01D ,  B28B ,  C01B

公开(公告)号：ZA8706896B

公开(公告)日：1988-03-17

申请号：ZA8706896

申请日：1987-09-15

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： STANLEY JOSEPH LUSZCZ ,  ANDREW WILLARD URQUHART ,  MARC STEVENS NEWKIRK

IPC: B28B20060101 ,  C01B20060101 ,  C04B20060101 ,  C04B37/00 ,  C04B41/88 ,  C23F20060101 ,  C04B ,  B28B ,  C01B ,  C23F

公开(公告)号：ZA875716B

公开(公告)日：1988-02-11

申请号：ZA875716

申请日：1987-08-03

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： STANLEY JOSEPH LUSZCZ ,  HARRY RICHARD ZWICKER

IPC: C04B35/622 ,  C04B35/10 ,  C04B35/65 ,  C22C29/12 ,  C04B ,  C22C ,  B28B

Abstract: The disclosure concerns self-supporting ceramic structures, including ceramic composite structures embedding a filler, and methods of making them. The ceramic structures comprise a polycrystlline material made by oxidation of a body of molten parent metal with an oxidant. The polycrystalline material has a first region substrate surmounted by a terminal region stratum which is integral with the first region. The terminal region stratum which is harder and of denser, finer crystalline structure than the first region substrate and is formed in a reaction stage subsequent to the reaction stage in which the first region of polycrystalline material is formed. Growth of the first stage is attained by by attenuating or interrupting the transport of molten parent metal to the first region under conditions which nonetheless leave or maintain therein enough oxidizable molten parent metal to form the polycrystalline material of the terminal region.

公开(公告)号：ES2036595T3

公开(公告)日：1993-06-01

申请号：ES87630183

申请日：1987-09-10

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： KENNEDY, CHRISTOPHER R. ,  URQUHART, ANDREW W. ,  WHITE, DANNY R. ,  NEWKIRK, MARC S.

IPC: C04B35/622 ,  C04B35/10 ,  C04B35/65 ,  C22C1/10 ,  C22C29/12 ,  C22C29/16

Abstract: A method is disclosed for producing a ceramic body by oxidation of a parent metal, the ceramic body having a graded microstructure characterized by a plurality of zones differing from each other in one or more properties. The zones in the ceramic body are attained by altering the process conditions during formation of said ceramic body such that a zone of the oxidation reaction product formed posterior to said altering has one or more properties different from a zone of the oxidation reaction product formed anterior to said altering.

公开(公告)号：ES2032857T3

公开(公告)日：1993-03-01

申请号：ES87630196

申请日：1987-09-16

Applicant: LANXIDE TECHNOLOGY COMPANY, LP. ,  ALCAN INTERNATIONAL LIMITED

Inventor： PARK, EUGENE SANGMOO ,  POSTE, STEVEN DOUGLAS

IPC: C04B35/10 ,  C04B35/622 ,  C04B35/65 ,  C04B35/80 ,  C04B38/00 ,  C23C8/10 ,  C23C8/24

Abstract: Ceramic foams in which the open cells (3) are connected by a three dimensional, substantially continuous ceramic matrix formed of interconnected hollow ligaments (5), are made from an open-cell, reticulated precursor metal, i.e. a metal foam. The precursor metal first is treated so as to allow a support coating to form thereon, and thereafter the coated precursor is heated above the melting point of the metal in the presence of an oxidant to form an oxidation reaction product.

公开(公告)号：ES2032856T3

公开(公告)日：1993-03-01

申请号：ES87630184

申请日：1987-09-10

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： NADKARNI, SADASHIV K. ,  RAGHAVAN, NARASIMHA S.

IPC: C04B35/622 ,  C04B35/10 ,  C04B35/117 ,  C04B35/65 ,  C22C1/10 ,  C22C29/02 ,  C22C29/12 ,  C22C29/14 ,  C22C29/16

Abstract: Production of composite ceramic articles by infiltration of a particulate, permeable bed or permeable preform with a polycrystalline matrix produced as a metal-oxidant reaction product, wherein the bed or preform is comprised of dross.

公开(公告)号：ES2032855T3

公开(公告)日：1993-03-01

申请号：ES87630182

申请日：1987-09-10

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： DWIVEDI, RATNESH K. ,  KENNEDY, CHRISTOPHER R.

IPC: C04B41/80 ,  C04B35/00 ,  C04B35/622 ,  C04B35/65 ,  C04B41/50 ,  C04B41/87

Abstract: A method of producing self-supporting ceramic structures (12) comprising (i) a polycrystalline oxidation reaction product formed upon oxidation of a molten parent metal (14) with an oxidant, and (ii) interconnected porosity (13) at least partially accessible from one or more surfaces (15) of said ceramic body. A second polycrystalline ceramic material is incorporated into the porosity of said ceramic body to modify or contribute to its properties.

公开(公告)号：ES2032854T3

公开(公告)日：1993-03-01

申请号：ES87630178

申请日：1987-09-03

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： NEWKIRK, MARC S. ,  WEINSTEIN, JERRY

IPC: C04B35/622 ,  B22F3/26 ,  C04B35/10 ,  C04B35/65 ,  C04B41/87 ,  C22C1/10 ,  C22C29/12

Abstract: A method of producing self-supporting ceramic structures includes providing a first self-supporting ceramic body (10) comprising (i) a polycrystalline oxidation reaction product (12) formed upon oxidation of a first molten parent metal with a first oxidant, and (ii) interconnected porosity (13) at least partially accessible from one or more surfaces (15) of said first ceramic body (10). A second ceramic body is used to form, by reaction with a vapor-phase oxidant, a second polycrystalline material which is infiltrated into the porosity of at least a zone of said first ceramic body (10).

公开(公告)号：ES2028061T3

公开(公告)日：1992-07-01

申请号：ES87300409

申请日：1987-01-19

Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

Inventor： NEWKIRK, MARC S. ,  URQUHART, ANDREW W. ,  LESHER, H. DANIEL

IPC: C04B35/622 ,  C04B35/117 ,  C04B35/65

Abstract: A method of producing a self-supporting ceramic composite body having therein at least one cavity which inversely replicates the geometry of a positive mold of parent metal, includes embedding the mold of parent metal within a conformable bed of filler to provide therein a cavity shaped and filled by the mold. The assembly is heated to melt the parent metal mold, e.g., an aluminum parent metal mold, and contacted with an oxidant to oxidize the molten parent metal to form a polycrystalline material which grows through the surroundings of filler, the molten metal being drawn through the growing polycrystalline material to be oxidized at the interface between the oxidant and previously formed oxidation reaction product whereby the cavity formerly filled by the mold of parent metal is eventually evacuated by the metal. There remains behind a cavity whose shape inversely replicates the original shape of the mold. The method provides ceramic composite articles having therein at least one cavity inversely replicating the shape of the mold which supplied the parent metal for oxidation.