Silicon-nitride and metal composite

Patent · Tue Oct 06 04:00:00 EDT 1981

OSTI ID:5620764

Huffsmith, S A; Landingham, R L

A composite and a method for bonding the composite are described. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MOSI2 indirectly bonding the composite together. The method includes contacting the layer of MOSI2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400* 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.

• Assignee: Dept. of Energy
• Patent Number(s): US 4293619
• OSTI ID: 5620764
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BONDING
CHEMICAL COMPOSITION
COMPRESSION
ELEMENTS
FABRICATION
HELICAL ROTARY SCREW EXPANDER
JOINING
LAYERS
MACHINERY
METALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SILICIDES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
POWER GENERATION
REFRACTORY METALS
SERVICE LIFE
SILICIDES
SILICON COMPOUNDS
SILICON NITRIDES
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
VERY HIGH TEMPERATURE