Journal article
Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength
Chongqing University1
Department of Mechanical Engineering, Technical University of Denmark2
Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark3
Chongqing Polycomp International Corporation4
Chongqing Materials Research Institute Co.,Ltd.5
Department of Wind Energy, Technical University of Denmark6
Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark7
Pt-20Rh dispersion strengthened by ZrO2 particles in different volume fractions has been produced by consolidation of milled powder which has been internally oxidized. The microstructure has been characterized by scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy; tensile properties have been determined at RT and 1000 °C.
The Pt-20Rh matrix is subdivided on the submicrometer scale by low angle dislocation boundaries and high angle boundaries. ZrO2 particles with sizes in the range 5–35 nm are uniformly distributed and with increasing volume fraction the flow stress increases and at 0.9% it is doubled both at RT and at 1000 °C.
Based on the superposition of particle and matrix strengthening, the flow stress has been calculated and good accord has been found with experiment both at RT and 1000 °C.
| Language: | English |
|---|---|
| Year: | 2019 |
| Pages: | 138305 |
| ISSN: | 18734936 and 09215093 |
| Types: | Journal article |
| DOI: | 10.1016/j.msea.2019.138305 |
| ORCIDs: | Yu, Tianbo and Huang, Xiaoxu |
