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- Densification Behavior of Mechanically Alloyed NiAl Powder Compact during Spark-plasma Sintering and its Mechanical Property
- Ji-Soon Kim, Soon-Ho Jung, Young-Il Jang, Young-Soon Kwon
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Journal of Korean Powder Metallurgy Institute 2003;10(3):172-175
DOI: https://doi.org/10.4150/KPMI.2003.10.3.172
1School of Materials Science and Engineering, University of Ulsan
2School of Materials Science and Engineering, University of Ulsan
3School of Materials Science and Engineering, University of Ulsan
4School of Materials Science and Engineering, University of Ulsan
2School of Materials Science and Engineering, University of Ulsan
3School of Materials Science and Engineering, University of Ulsan
4School of Materials Science and Engineering, University of Ulsan
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Abstract
Mechanically-alloyed NiAl powder was sintered by Spark-Plasma Sintering (SPS) process. Densification and behavior mechanical property were determined from the experimental results and analysis ,such as changes in linear shrinkage, shrinkage rate, microstructure, and phase during sintering process, Victors hardness, and transver.ie-rupture-strength (TRS). Above 97% relative density was obtained after sintering at 1150°C for 5 min. Crystallite size determined by the Scherrer method was approximately 50 nm. From the X-ray diffraction analysis it was confirmed that the sintered bodies were composed mainly of NiAl phase together with Ni_3Al phase. Measured Vickers hardness and TRS value were 555pm10 H_v and 1393pm75 MPa , respectively.
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