公开(公告)号：DE2725587A1

公开(公告)日：1978-12-21

申请号：DE2725587

申请日：1977-06-07

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  WUSIRIKA RAJA RAO

IPC: C03C3/11 ,  C03C10/00 ,  C03C3/22 ,  C03B32/00

Abstract: A thermally crystallisable glass comprises (by wt.) 55-70% SiO2, 20-30% Al2O3 and 3.5-15% N. The glass ceramic exhibits many of the desirable properties of sintered Si3N4, e.g. high strength, excellent abrasion resistance, high decompsn. temp., good thermal shock resistance and resistance to corrosive environments. Also the glass ceramic in non-porous and a max. density, unlike Si3N4 which cannot be sintered in its pure form to max density, and as it can be fabricated easily to any desired shape it find application in many high temp. engineering areas.

公开(公告)号：DE3776315D1

公开(公告)日：1992-03-05

申请号：DE3776315

申请日：1987-11-25

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  GADKAREE KISHOR PURUSHOTTAM ,  STEWART RONALD LEROY ,  TAYLOR MARK PETER

IPC: C03C3/062 ,  C03C3/097 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00

Abstract: The present invention is directed to the production of SiC whisker- and/or fiber-reinforced, internally-nucleated glass-ceramic matrix composite articles consisting essentially of 0.5-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers substantially uniformly distributed in a glass-ceramic matrix consisting essentially, in weight percent on the oxide basis, of 16-20% CaO, 38.5-46% Al2O3, 35-42% SiO2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% CR2O3, 0.25-3% HfO2, 2-5% MoO3, 0.25-3% Nb2O5, 0.25-3% Ta2O5, 0.25-3% WO3, and 1-10% ZrO2, wherein Al2O3 is present in an amount which is at least 5 mole percent and up to 50 mole percent in excess of that present in stoichiometric triclinic anorthite, and wherein the predominant crystal phases in the glass-ceramic are triclinic anorthite and mullite and/or alpha -Al2O3. Up to 1.5% As2O3 may advantageously be included in the composition.

公开(公告)号：DE3676873D1

公开(公告)日：1991-02-21

申请号：DE3676873

申请日：1986-05-07

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  TAYLOR MARK PETER ,  FENN PHILIP MICHAEL

IPC: C03C3/085 ,  C03B32/02 ,  C03C4/00 ,  C03C10/00 ,  C03C10/14 ,  G01C19/64 ,  G01C19/66

Abstract: This invention relates to the production of transparent glass-ceramic bodies exhibiting properties especially suitable for use in ring laser gyros. The inventive products contain β-quartz solid solution as essentially the sole crystal phase and consist essentially, expressed in terms of weight percent on the oxide basis, of

公开(公告)号：DE3579055D1

公开(公告)日：1990-09-13

申请号：DE3579055

申请日：1985-05-15

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  SCHULTZ PETER CHARLES ,  TAYLOR MARK PETER

IPC: C03C8/16 ,  B32B5/12 ,  B32B18/00 ,  C03C10/00 ,  C03C10/04 ,  C03C14/00 ,  C04B35/80 ,  G02B5/08 ,  C03B23/20

Abstract: This invention relates to the production of mirror blanks comprising a low expansion graphite or SiC fiber reinforced glass-ceramic composite substrate with a surface facing of a glass or glass-ceramic bonded thereto having an expansion closely matching that of the composite.

公开(公告)号：AU591822B2

公开(公告)日：1989-12-14

申请号：AU8251587

申请日：1987-12-14

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  GADKAREE KISHOR PURUSHOTTAM ,  STEWART RONALD LEROY ,  TAYLOR MARK PETER

IPC: C03C3/062 ,  C03C3/097 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00

Abstract: The present invention is directed to the production of SiC whisker- and/or fiber-reinforced, internally-nucleated glass-ceramic matrix composite articles consisting essentially of 0.5-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers substantially uniformly distributed in a glass-ceramic matrix consisting essentially, in weight percent on the oxide basis, of 16-20% CaO, 38.5-46% Al2O3, 35-42% SiO2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% CR2O3, 0.25-3% HfO2, 2-5% MoO3, 0.25-3% Nb2O5, 0.25-3% Ta2O5, 0.25-3% WO3, and 1-10% ZrO2, wherein Al2O3 is present in an amount which is at least 5 mole percent and up to 50 mole percent in excess of that present in stoichiometric triclinic anorthite, and wherein the predominant crystal phases in the glass-ceramic are triclinic anorthite and mullite and/or alpha -Al2O3. Up to 1.5% As2O3 may advantageously be included in the composition.

公开(公告)号：CA1247658A

公开(公告)日：1988-12-28

申请号：CA494176

申请日：1985-10-30

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  GADKAREE KISHOR P ,  TAYLOR MARK P

IPC: C03C3/095 ,  C03C14/00

Abstract: The present invention is directed to the preparation hybrid composite bodies composed of an essentially alkali-free, alkaline earth aluminosilicate glass matrix reinforced with SiC whiskers and continuous ceramic fibers.

公开(公告)号：AT29481T

公开(公告)日：1987-09-15

申请号：AT83630083

申请日：1983-05-17

Applicant: UNITED TECHNOLOGIES CORP ,  CORNING GLASS WORKS

Inventor： BRENNAN JOHN J ,  CHYUNG KENNETH ,  TAYLOR MARK P

IPC: C03C10/12 ,  C03C10/14 ,  C03C14/00 ,  D01F9/08

公开(公告)号：DE3461626D1

公开(公告)日：1987-01-22

申请号：DE3461626

申请日：1984-01-10

Applicant: CORNING GLASS WORKS

Inventor： BEALL GEORGE H ,  CHIRINO AGUSTIN M ,  CHYUNG KENNETH ,  MARTIN FRANCIS W ,  TAYLOR MARK P

IPC: C03C3/085 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00 ,  C03B32/00

Abstract: Glass-ceramic bodies exhibiting high strength and capable of being used at temperatures of 1300 DEG C and higher have barium osumilite as the predominant crystal phase, the glass ceramic bodies having overall compositions consisting essentially, in weight percent, of: … …… The bodies can be utilized in monolith form and are very useful as matrices for fiber reinforced structures suitable for high temperature applications.

公开(公告)号：BR8505756A

公开(公告)日：1986-12-16

申请号：BR8505756

申请日：1985-11-14

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH ,  COOPER REID FRANKLIN ,  GADKAREE KISHOR PURUSHOTTAM ,  STEWART RONALD LEROY ,  TAYLOR MARK PETER

IPC: C03B32/00 ,  C03B32/02 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00

Abstract: The present invention is directed to SiC whisker and/or fiber reinforced glass-ceramic matrix composite articles wherein an alkaline earth aluminosilicate constitutes the predominant crystal phase. More particularly, the composite articles will consist essentially of 10-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers and the glass-ceramic matrix will consist essentially, by weight on the oxide basis, ofThe preferred predominant crystal phase is selected from the group of anorthite and its pseudo-binaries, with mullite, cordierite, barium osumilite, and albite solid solution.

公开(公告)号：DE2704018A1

公开(公告)日：1977-09-29

申请号：DE2704018

申请日：1977-02-01

Applicant: CORNING GLASS WORKS

Inventor： CHYUNG KENNETH

IPC: C03C4/10 ,  C03C10/00 ,  C03C10/14 ,  C03C3/22 ,  C03B32/00 ,  H05B3/74

Abstract: This invention is concerned with the production of highly-crystalline, transparent glass-ceramic articles, wherein the predominant crystal phase is a beta-quartz solid solution, and which exhibit transmittances of infra-red radiations in excess of 75%, and, frequently in excess of 85%, at a wave length of 2.5 microns in articles having cross sections of about 3 mm. The articles also demonstrate excellent resistance to attack by acids and detergents, and possess coefficients of thermal expansion over the range of room temperature (R.T.) to 600 DEG C. of less than 10 x 10 7/ DEG C. Compositions operable in the invention are encompassed within a very narrow range of the Li2O-MgO-ZnO-Al2O3-SiO2 quinary nucleated with a combination of TiO2 + ZrO2. Where desired, coloring agents conventional in the glass art can be added to yield colored, transparent, glass-ceramic articles.