Method for manufacturing whisker preforms and composites

Lessing, P A

Title: Method for manufacturing whisker preforms and composites

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Abstract

A process is disclosed for manufacturing Si{sub 3}N{sub 4}/SiAlON whiskers by mixing silicon carbide powder with aluminum nitride powder, adding impurities such as calcium oxide or potassium chloride to control whisker characteristics, forming the mixture in a boron nitrogen mold of desired shaped and hot isostatically pressing the formed mixture in a nitrogen environment to produce whiskers comprised substantially of SiAlON at the nucleating end of the whisker and Si{sub 3}N{sub 4} at the other end of the whisker. In one embodiment, reinforced composites are formed by impregnating the Si{sub 3}N{sub 4}/SiAlON whisker preform with a matrix material such as resin binders, liquid metals, intermetallics or ceramic materials.

Inventors:: Lessing, P A

Issue Date:: 1995-11-07

Research Org.:: EG & G Idaho Inc

OSTI Identifier:: 131915

Patent Number(s):: 5464583

Application Number:: PAN: 8-100,008

Assignee:: Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

DOE Contract Number:: AC07-76ID01570

Resource Type:: Patent

Resource Relation:: Other Information: PBD: 7 Nov 1995

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; SILICON NITRIDES; FABRICATION; ALUMINIUM OXIDES; COMPOSITE MATERIALS; HOT PRESSING; CONTROLLED ATMOSPHERES; IMPREGNATION

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                    Lessing, P A. Method for manufacturing whisker preforms and composites.  United States: N. p., 1995. 
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                    Lessing, P A. Method for manufacturing whisker preforms and composites.  United States.

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                    Lessing, P A. Tue .  
        "Method for manufacturing whisker preforms and composites".  United States.

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@article{osti_131915,

  title        = {Method for manufacturing whisker preforms and composites},

  author       = {Lessing, P A},

  abstractNote = {A process is disclosed for manufacturing Si{sub 3}N{sub 4}/SiAlON whiskers by mixing silicon carbide powder with aluminum nitride powder, adding impurities such as calcium oxide or potassium chloride to control whisker characteristics, forming the mixture in a boron nitrogen mold of desired shaped and hot isostatically pressing the formed mixture in a nitrogen environment to produce whiskers comprised substantially of SiAlON at the nucleating end of the whisker and Si{sub 3}N{sub 4} at the other end of the whisker. In one embodiment, reinforced composites are formed by impregnating the Si{sub 3}N{sub 4}/SiAlON whisker preform with a matrix material such as resin binders, liquid metals, intermetallics or ceramic materials.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1995},

  month        = {11}

}

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