Bulk intermetallic compound in Ni-Al system by low-time mechanical alloying followed by spark plasma sintering
سال انتشار: 1400
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 264
فایل این مقاله در 9 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
IMES15_128
تاریخ نمایه سازی: 13 بهمن 1400
چکیده مقاله:
In this research, formation of Ni۳Al intermetallic compound was investigated using mechanical alloying (MA) of Ni and Al powders, spark plasma sintering (SPS) and subsequent annealing. In this regard, mixture of primary powders with composition of Ni۷۵Al۲۵ was mechanically alloyed for ۱۵ h and then sintered using spark plasma method at ۶۰۰ °C under ۴۰ MPa pressure for ۲۰ min. Furthermore, annealing cycles was applied at ۶۰۰ °C for ۲ h and ۱۰۰۰ °C for ۱, ۱۰ and ۲۰ h. Phase evolution, microstructure and hardness were assessed using X-ray diffraction (XRD), optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and Vickers hardness test. Results indicated that the synthesized sample consisted of mainly Ni(Al) phase with a small amount of Ni۳Al/Ni۲Al۳ intermetallic compounds. With increasing annealing time and/or temperature, the amount of intermetallic compounds increased. Hardness value also rose from ۱۶۲ to ۲۰۳ HV by increment in annealing temperature and time, due to higher fraction of intermetallic phases.
کلیدواژه ها:
نویسندگان
Mojtaba Babaei
M.Sc. student, Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran.
Sina Ghaderi
M.Sc. student, Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.
Mohammad Hossein Enayati
Full professor, Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.