Silicon-nitride and metal composite

Landingham, Richard L; Huffsmith, Sarah A

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Title: Silicon-nitride and metal composite

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Abstract

A composite and a method for bonding the composite. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MoSi.sub.2 indirectly bonding the composite together. The method includes contacting the layer of MoSi.sub.2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400.degree. C.; and, simultaneously with the heating, compressing the layer such that the contacting is with a pressure of at least 30 MPa. This composite overcomes useful life problems in the fabrication of parts for a helical expander for use in power generation.

Inventors:

Landingham, Richard L ^[1]; Huffsmith, Sarah A ^[2]

Livermore, CA
Urbana, IL

Issue Date:: Thu Jan 01 00:00:00 EST 1981

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:: 864025

Patent Number(s):: 4293619

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2237/08 - Non-oxidic interlayers
C04B2237/09 - wherein the active component for bonding is not the largest fraction of the interlayer
C04B2237/368 - Silicon nitride
C04B2237/403 - Refractory metals
C04B2237/60 - Forming at the joining interface or in the joining layer specific reaction phases or zones, e.g. diffusion of reactive species from the interlayer to the substrate or from a substrate to the joining interface, carbide forming at the joining interface
C04B2237/708 - of one or more of the interlayers
C04B2237/72 - Forming laminates or joined articles comprising at least two interlayers directly next to each other
C04B35/584 - based on silicon nitride
C04B35/645 - Pressure sintering
C04B37/025 - {consisting of glass or ceramic material}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/12056 - Entirely inorganic
Y10T428/12063 - Nonparticulate metal component
Y10T428/12549 - Adjacent to each other
Y10T428/12576 - Boride, carbide or nitride component
Y10T428/12812 - Diverse refractory group metal-base components
Y10T428/12826 - Group VIB metal-base component

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Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: silicon-nitride; metal; composite; method; bonding; ceramic; portion; silicon; nitride; refractory; layer; mosi; indirectly; contacting; surface; heating; temperature; below; 1400; degree; simultaneously; compressing; pressure; 30; mpa; overcomes; useful; life; fabrication; helical; expander; power; generation; useful life; ceramic portion; temperature below; refractory metal; silicon nitride; power generation; metal composite; metal portion; /428/257/416/419/

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                    Landingham, Richard L, and Huffsmith, Sarah A. Silicon-nitride and metal composite.  United States: N. p., 1981. 
        Web.

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                    Landingham, Richard L, & Huffsmith, Sarah A. Silicon-nitride and metal composite.  United States.

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                    Landingham, Richard L, and Huffsmith, Sarah A. Thu .  
        "Silicon-nitride and metal composite".  United States.  https://www.osti.gov/servlets/purl/864025.

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@article{osti_864025,

  title        = {Silicon-nitride and metal composite},

  author       = {Landingham, Richard L and Huffsmith, Sarah A},

  abstractNote = {A composite and a method for bonding the composite. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MoSi.sub.2 indirectly bonding the composite together. The method includes contacting the layer of MoSi.sub.2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400.degree. C.; and, simultaneously with the heating, compressing the layer such that the contacting is with a pressure of at least 30 MPa. This composite overcomes useful life problems in the fabrication of parts for a helical expander for use in power generation.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1981},

  month        = {Thu Jan 01 00:00:00 EST 1981}

}

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