| Autor: |
Kats, S. M., Ordan'yan, S. S., Unrod, V. I. |
| Zdroj: |
Powder Metallurgy and Metal Ceramics; December 1981, Vol. 20 Issue: 12 p886-890, 5p |
| Abstrakt: |
A study was made of the compressive creep of two-phase alloys of the ZrC-ZrB2 and TiC-TiB2 systems at temperatures of 1700–2420°C and stresses of 5–30 MPa. In the ZrC-ZrB2 system two-phase alloys in a wide range of carbide phase concentrations — from 20 to 70 mole% are characterized by a creep rate exceeding by one to two orders the creep rates of their individual components, while in the TiC-TiB2 system the highest creep rate is exhibited by alloys with carbide contents of 30–50 mole %. The effect of contamination with tungsten carbide on the creep of alloys of the systems investigated was determined. In TiC-TiB2 alloys it is possible for coherent phase boundaries to form and for superplastic creep phenomena to manifest themselves, involving also the operation of threshold mechanisms of plastic deformation. |
| Databáze: |
Supplemental Index |
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