Influence of Yttria on the Molybdenum-based alloys

The mechanical properties of a new molybdenum-based alloy ZHMR are investigated. SEM, TEM, XRD, AES, EDS have been used to analyse the phase structure of ZHMR and its effects on mechanical properties have been discussed. The results indicate that the mechanical properties of PM-ZHMR3 and PM-ZHMR4 ar...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 1992, Vol.11 (6), p.351-356
Main Authors: Yin, J.S., Lü, Z., Xing, Y.H.
Format: Article
Language:English
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Summary:The mechanical properties of a new molybdenum-based alloy ZHMR are investigated. SEM, TEM, XRD, AES, EDS have been used to analyse the phase structure of ZHMR and its effects on mechanical properties have been discussed. The results indicate that the mechanical properties of PM-ZHMR3 and PM-ZHMR4 are superior to the properties of the other alloys. The improvements of PM-ZHMR4 over PM-ZHMR1 at room temperature are as follows: the tensile strength, 150 MPa; compressive strength, 400 MPa; Vickers hardness, 500 MPa. The improvement of tensile strength is 50 MPa at 1000°C. The optical micrographs reveal that yttria makes the grain size finer, and raises the recrystallisation temperature. XRD analysis manifests that the main phase that yttria forms in PM-ZHMR is Y 2Hf 2O 7.
ISSN:0263-4368
2213-3917
DOI:10.1016/0263-4368(92)90089-K