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Sintering properties of Ti-27Nb alloys prepared by using Ti/TiH2 powders under argon and hydrogen sintering processes
- Source :
- Powder Technology. 339:775-780
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- In the present study, Ti-27Nb alloy specimens were prepared from Ti/TiH2 powders using Nb powders through the argon sintering process (ASP) and hydrogen sintering process (HSP). X-ray diffraction and scanning electron microscopy studies were conducted, and the sintered density, Vickers hardness, and Rockwell hardness of the Ti-27Nb alloys produced by different sintering processes, as a function of the vacuum sintering temperature (1350–1450 °C), were measured. The results showed that the Ti-27Nb alloy sintered bodies with the highest density and hardness were obtained by HSP. In addition, the pore size and number of HSP specimens were smaller and less than those of the ASP specimens. It was found that the Ti-27Nb alloy, produced by HSP, can prevent the formation of oxide layers, resulting in enhanced densification and hardness. Furthermore, HSP can also prevent the formation of hydrides and eliminate the dehydrogenation step. At the same time, the problem of brittleness and failure caused by hydride formation could be solved.
- Subjects :
- Materials science
Hydrogen
Scanning electron microscope
Hydride
General Chemical Engineering
Metallurgy
Alloy
technology, industry, and agriculture
Oxide
chemistry.chemical_element
Sintering
02 engineering and technology
engineering.material
equipment and supplies
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Rockwell scale
chemistry
Vickers hardness test
engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 00325910
- Volume :
- 339
- Database :
- OpenAIRE
- Journal :
- Powder Technology
- Accession number :
- edsair.doi...........3d80da35a25103d5f51b6b1700d71124