期刊
COATINGS
卷 11, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/coatings11101246
关键词
NiTi alloy; annealing; indentation; wear; scratch test
资金
- Czech Science Foundation [20-14114S]
- MEYS of the Czech Republic
- infrastructure projects CzechNanoLab Research Infrastructure [LM2018110]
- SOLID 21 [CZ.02.1.01/0.0/0.0/16_019/0000760]
- ESS-participation of the Czech Republic-OP [CZ.02.1.01/0.0/0.0/16_013/0001794]
- Operational Program Research, Development and Educationof the Ministry of Education, Youth and Sports of the Czech Republic [CZ.02.1.01/0.0/0.0/17_049/0008422, CZ.02.1.01/0.0/0.0/16_019/0000754]
- Technology Agency of the Czech Republic [TN01000038, TH03020245]
- Palacky University [IGA_PrF_2021_004]
The study investigated the tribological behaviors of NiTi alloy produced by the spark plasma sintering (SPS) method before and after annealing at different temperatures. The alloy annealed at 350 degrees C showed better hardness, scratch, and wear resistance compared to other annealed samples. The high wear resistance of the annealed NiTi alloy may be attributed to its metastable R-phase, and acoustic emissions proved to be an effective way to explore the durability of SPS NiTi alloys during nano/micro-tribomechanical testing.
The tribological behaviors of NiTi alloy produced by the spark plasma sintering (SPS) method before and after annealing were investigated at various loading conditions via indentation, scratch, and wear tests. Indentation tests were performed by a pyramidal Berkovich indenter, while scratch and wear tests were carried out by a diamond Rockwell spherical indenter at room temperature. The annealing of the as-prepared samples was performed at 350, 450, and 550 degrees C in the ambient atmosphere. The influence of the annealing temperature on the sample behavior towards tribological study was investigated here. The results indicated that the alloy annealed at 350 degrees C showed a higher hardness compared to the other annealed alloys. The scratch and wear resistance of the annealed sample at 350 degrees C showed a better performance in comparison to the other samples under a constant load. The high wear resistance of the annealed NiTi alloy may be attributed to its metastable R-phase. The detection and evaluation of acoustic emissions during the nano/micro-tribomechanical testing proved to be a very effective way for the exploration of the durability of SPS NiTi alloys.
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