Structure and properties of transition metal-metalloid glasses based on refractory metals

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/6215879· OSTI ID:6215879

Johnson, W. L.; Williams, A. R.

The structure and properties of several new transition metal-metalloid (TM/sub 1-x/M/sub x/) metallic glasses based on refractory transition metals (e.g. Mo, W, Ru etc.) have been systemically investigated as a function of composition. The structure of the alloys has been investigated by x-ray diffraction methods and measurements of superconducting properties, electrical resistivity, density, hardness, and mechanical behavior were made. These data are used in developing a novel description of the structure of TM/sub 1-x/M/sub x/ glasses. The experimental evidence suggests that an ideal amorphous phase forms at a specific composition x/sub c/ and that this phase has a well defined atomic short range order. For metallic glasses having x < x/sub c/ (metalloid poor glasses) vacancy-like defects form, which are characterized by the excess volume which they contribute to the glass. Another, as yet unspecified defect appears to form in glasses with x > x/sub c/. This novel picture can explain the variation of many properties of these glasses with metalloid concentration.

• Research Organization: California Inst. of Tech., Pasadena (USA). W.M. Keck Lab. of Engineering Materials
• OSTI ID: 6215879
• Report Number(s): CALT-822-107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals &amp; Alloys-- Mechanical Properties
360203* -- Ceramics
Cermets
&amp; Refractories-- Mechanical Properties
360603 -- Materials-- Properties
ALLOYS
BORIDES
BORON COMPOUNDS
COPPER ALLOYS
DEFECTS
DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GALLIUM ALLOYS
GLASS
HARDNESS
LANTHANUM ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
PALLADIUM ALLOYS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
PNICTIDES
RARE EARTH ALLOYS
RUTHENIUM ALLOYS
SILICIDES
SILICON COMPOUNDS
SUPERCONDUCTIVITY
TUNGSTEN ALLOYS