Elastic moduli of MoSi2-based materials
Creators
- 1. Center for Materials Science, Mail Stop K765, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Description
We prepared MoSi2, two-phase MoSi2/Mo5Si3, and (Mo,W)Si2 solid-solution alloy powders by mechanically alloying mixtures of elemental molybdenum, silicon, and tungsten. These powders were consolidated by hot-pressing them at 1500 degree C in graphite dies. We measured the elastic moduli of these alloys by a recently developed technique for non-contact ultrasonic spectroscopy. Second-phase Mo5Si3 additions to MoSi2 result in decreased values for G and E, whereas alloying MoSi2 with WSi2 results in increased values for G and E. An analysis of these Young's moduli and of data from the literature for various intermetallic alloys suggests that for any given alloy system, the Young's moduli for its various intermetallics as a function of density fall on a straight line. Further, the lines for the different alloy systems are approximately parallel
Additional details
Publishing Information
- Journal Title
- Journal of Materials Research
- Journal Volume
- 7
- Journal Issue
- 7
- Journal Page Range
- p. 1610-1613.
- ISSN
- 0884-2914
- CODEN
- JMREEE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24014262
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ELASTICITY; HOT PRESSING; MOLYBDENUM SILICIDES; POWDERS; SOLID SOLUTIONS; TEMPERATURE RANGE 1000-4000 K; TUNGSTEN SILICIDES; ULTRASONIC TESTING
- Descriptors DEC
- ACOUSTIC TESTING; DISPERSIONS; FABRICATION; HOMOGENEOUS MIXTURES; MATERIALS TESTING; MATERIALS WORKING; MECHANICAL PROPERTIES; MIXTURES; MOLYBDENUM COMPOUNDS; NONDESTRUCTIVE TESTING; PRESSING; SILICIDES; SILICON COMPOUNDS; SOLUTIONS; TEMPERATURE RANGE; TESTING; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN COMPOUNDS