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US 5,728,445 AGranted
Fastening member
AssigneeResearch Institute of Advanced Material Gas-Generator, Ltd.
InventorsYuichi Murakami, Toshiyuki Suzuki, Takuo Hasegawa, Mitsuhiko Sato, Nobuyuki Suzumura
Life of this patent
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Abstract
A fastening member is formed from a fiber-reinforced ceramic composite material, in which a ceramic material is reinforced with a plurality of inorganic long fibers. The inorganic long fibers are located in the ceramic material such that first orientated layers, in which the inorganic long fibers are orientated in a predetermined direction, and second orientated layers, in which the inorganic long fibers are orientated in a direction different from the direction of orientation of the inorganic long fibers in the first orientated layers, may be laminated alternately.
Claims7
A fastening member comprising:
- a fiber-reinforced ceramic composite material, in which a ceramic material is reinforced with a plurality of inorganic long fibers, said ceramic material comprising glass-ceramics having a density ranging from 2.0 to 3.2 g/cm.sup.3, and being selected from the group consisting of Li.sub.2 O--Al.sub.2 --MgO--SiO.sub.2 --Nb.sub.2 O.sub.5, MgO--Al.sub.2 --SiO.sub.2, BaO--MgO--Al.sub.2 O.sub.3 --SiO.sub.2 , and CaO--Al.sub.2 O.sub.2 O.sub.3 --SiO.sub.2, said inorganic long fibers having a mean diameter ranging from 5 to 200 .mu.m, a mean length of at least 500 .mu.m, and a density ranging from 2.2 to 3.2 g/cm.sup.3,
- wherein said inorganic long fibers are located in said ceramic material such that first orientated layers, in which said inorganic long fibers are orientated in a predetermined direction, and second orientated layers, in which said inorganic long fibers are orientated in a direction different from the direction of orientation of said inorganic long fibers in said first orientated layers, are laminated alternately,
- said fastening member having a length and a width, said length extending in a longitudinal direction and including an external thread,
- the direction of orientation of said inorganic long fibers in said first orientated layers ranging between 0.degree. and 90.degree. with respect to the longitudinal direction of said external thread, and
- the direction of orientation of said inorganic long fibers in said second orientated layers ranging between 0.degree. and 90.degree. with respect to the width of said fastening member.
2 more elements
A fastening member comprising:
- a fiber-reinforced ceramic composite material, in which a ceramic material is reinforced with a plurality of inorganic long fibers, said ceramic material comprising glass-ceramics having a density ranging from 2.0 to 3.2 g/cm.sup.3, and being selected from the group consisting of Li.sub.2 O--Al.sub.2 O.sub.3 --MgO--SiO.sub.2 --Nb.sub.2 O.sub.5, MgO--Al.sub.2 O.sub.3 --SiO.sub.2, BaO--Al.sub.2 O.sub.3 --SiO.sub.2, BaO--MgO--Al.sub.2 O.sub.3 --SiO.sub.2, and CaO--Al.sub.2 O.sub.2 O.sub.3 --SiO.sub.2, said inorganic long fibers having a mean diameter ranging from 5 to 200 .mu.m, a mean length of at least 500 .mu.m, and a density ranging from 2.2 to 3.2 g/cm.sub.3,
- wherein said inorganic long fibers are located in said ceramic material such that first orientated layers, in which maid inorganic long fibers are orientated in a predetermined direction, and second orientated layers, in which said inorganic long fibers are orientated in a direction different from the direction of orientation of said inorganic long fibers in said first orientated layers, are laminated alternately, said fastening member having a length and a width, said length extending in a longitudinal direction and including an external thread,
- the direction of orientation of said inorganic long fibers in said first orientated layers ranging from 0.degree. and 90.degree. with respect to said width of said fastening member, and
- the direction of orientation of said inorganic long fibers in said second orientated layers ranging from 0.degree. and 90.degree. with respect to said width of said fastening member.
1 more element
A process for producing a fastening member, comprising the steps of:
- i) embedding a plurality of inorganic long fibers in a ceramic material such that the inorganic long fibers are orientated in a predetermined direction, thereby obtaining a plurality of preforms, said ceramic material comprising glass-ceramics having a density ranging from 2.0 to 3.2 g/cm.sup.3, and being selected from the group consisting of Li.sub.2 O--Al.sub.2 O.sub.3 --MgO--SiO.sub.2 --Nb.sub.2 O.sub.5, MgO--Al.sub.2 O.sub.3 --SiO.sub.2, BaO--Al.sub.2 O.sub.3 --SiO.sub.2 type, BaO--MgO--Al.sub.2 O.sub.3 --SiO.sub.2, and CaO--Al.sub.2 O.sub.2 O.sub.3 --Si0.sub.2, said inorganic long fibers having a mean diameter ranging from 5 to 200 .mu.m, a mean length of at least 500 .mu.m, and a density ranging from 2.2 to 3.2 g/cm.sup.3,
- ii) laminating the obtained preforms such that the directions of orientation of the inorganic long fibers in adjacent preforms intersect each other an a predetermined angle,
- iii) sintering the laminated preforms to obtain a fiber-reinforced ceramic composite material,
- iv) cutting a piece with a predetermined directivity from the obtained fiber-reinforced ceramic composite material, and
- v) shaping the cut piece to obtain a fastening member having a thread.
2 more elements
Dependencies are inferred from the claim text.