KR960010573A - 위스커 보강된 알루미나 복합체의 무압 소결 방법 - Google Patents

위스커 보강된 알루미나 복합체의 무압 소결 방법 Download PDF

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KR960010573A
KR960010573A KR1019940029558A KR19940029558A KR960010573A KR 960010573 A KR960010573 A KR 960010573A KR 1019940029558 A KR1019940029558 A KR 1019940029558A KR 19940029558 A KR19940029558 A KR 19940029558A KR 960010573 A KR960010573 A KR 960010573A
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nitride
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엠. 로저스 윌리암
에프. 로즈 제임스
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제임스 에프. 로우즈
어드밴스드 콤포지트 머티리얼스 코포레이션
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)

Abstract

본 발명은 질화물 개량제를 사용하여 위스커(Whisker)보강 알루미나 복합체를 제조하기 위한 무압 소결방법(pressureless sintering process) 및 복합체에 관한 것이다. 위스커는 10이하의 애스펙트비(aspect ratio) 까지 분쇄된다. 소결단계중에 소결로내에서 본체표면이 대기 직접 노출되는 것을 방지하기 위하여 소결공정동안에 탄소 함유 재료로 그린예빕ㄴ체(green preform)를 둘러싼다.

Description

위스커 보강된 알루미나 복합체의 무압 소결 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (6)

  1. 적어도 약 95%의 이론상 밀도를 가지며 고온 균일 프레싱에 의해 고밀도화하면 적어도 약 98% 이론상 밀도를 얻기에 충분한 높은 폐쇄기공의 밀도 및 농도를 가지는 소결된 세라믹 복합체를 제공하기 위하여, 최대 이론치의 약 60% 내지 약 70%범위내의 밀도를 가지며 기본적으로 알루미나 및 약 4%까지의 소결 보조제로 이루어진 기질과, 3 내지 10범위내의 평균 애스펙트 비를 가지는 10 내지 25중량%의 단결정 위스커와, 기본적으로 실리콘 나이트라이드 또는 알루미늄 나이트라이드 또는 그 혼합물로 구성된 약 2 내지 7.5중량%의 질화물 개량제를 포함하는 혼합물로부터 만들어진 예비본체를 대기압에서 소결하는 것을 포함하는 소결 복합체 제조방법.
  2. 제1항에 있어서, 질소를 함유하는 가스 및 탄화수소를 함유한 정화가스를 사용하여 소결하는 것을 특징으로 하는 소결 복합체 제조방법.
  3. 제1항에 있어서, 탄소함유 재료로 둘러싼 예비본체를 사용하여 소결하는 것을 특징으로 하는 소결 복합체 제조방법.
  4. 제1항에 있어서, 약 5 내지 9범위내의 평균 애스펙트 비를 가지는 단결정 위스커를 함유한 예비본체를 소결하는 것을 특징으로 하는 소결 복합체 제조방법.
  5. 제1항에 있어서, 적어도 이론상 약 95%의 밀도를 가지며 고온 균일 프레싱에 의해 고밀도화 하면 적어도 약 98%의 이론상 밀도를 얻기에 충분한 높은 폐쇄기공의 밀도 및 농도를 가지는 소결 세라믹 복합체를 제공하기 위해, 예비존체가 소결로내의 조건에 직접 노출되는 것을 막는 탄소 함유 재료로 둘러싸인 상기 예비본체를 상기 소결로내에서 대기압에서 소결하는 것을 포함하며, 상기 예비본체가 최대 이론치의 약60% 내지 약 70%범위내의 밀도를 가지며 기본적으로 알루미나 및 최고 약 4중량%의 소결 보조제로 이루어진 기질과, 약 10내지 25중량%의 단결정 위스커와, 기본적으로 실리콘 나이트라이드 또는 알루미늄 나이트라이드 또는 그 혼합물로 구성된 약 2 내지 7.5중량%의 질화물 개량제를 포함하는 혼합물로 부터 만들어지는 것을 특징으로 하는 소결 복합체 제조방법.
  6. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940029558A 1994-09-13 1994-11-11 위스커강화 알루미나복합체의 상압소결방법 Expired - Fee Related KR100348772B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/305,137 US5656217A (en) 1994-09-13 1994-09-13 Pressureless sintering of whisker reinforced alumina composites
US08/305,137 1994-09-13
US8/305,137 1994-09-13

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KR960010573A true KR960010573A (ko) 1996-04-20
KR100348772B1 KR100348772B1 (ko) 2002-10-31

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US (1) US5656217A (ko)
EP (1) EP0701978A3 (ko)
JP (1) JP3554379B2 (ko)
KR (1) KR100348772B1 (ko)
RU (1) RU94041838A (ko)

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US5656217A (en) 1997-08-12
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