نتایج جستجو برای: ni50al50
تعداد نتایج: 16 فیلتر نتایج به سال:
In this work, Ni50Al50 alloy is taken into consideration as potential brazing material for joining ZrB2 ultra-high temperature ceramic. The results of experimental study on high interfacial phenomena between molten binary and polycrystalline ZrB2, are shown. A sessile drop method combined with a capillary purification procedure was applied to investigate the wetting behavior Ni50Al50/ZrB2 coupl...
در این کار پژوهشی، ترکیبات Ni50Al50 و Ni25Cr25Al50 (at%) مورد آلیاژسازی مکانیکی قرار گرفتند. تغییرات ساختاری ذرات پودر در طول آلیاژسازی مکانیکی به وسیله ی آزمون پراش پرتو ایکس (XRD) بررسی گردید. نتایج حاکی از تشکیل ترکیب بین فلزی نانوکریستال NiAl منظم از ترکیب Ni50Al50 پس از آلیاژسازی مکانیکی و ترکیب بین فلزی نانوکریستال NiCr)Al) از ترکیبNi25Cr25Al50 پس از آلیاژسازی مکانیکی و عملیات حرارتی بود....
The nucleation rate depends on the free-energy barrier and the kinetic factor. While the role of the free energy barrier is a text-book subject, the importance of the kinetic factor is frequently underestimated. In this study, we applied the mean first-passage time method, to obtain the free-energy landscape and kinetic factor directly from the molecular dynamics (MD) simulations of the nucleat...
in the present study, nanocrystalline ni50al50-xmox (x = 0, 0.5, 1, 2.5, 5) intermetallic compound was produced through mechanical alloying of nickel, aluminum, and molybdenum powders. alni compounds with good and attractive properties such as high melting point, high strength to weight ratio and high corrosion resistance especially at high temperatures have attracted the attention of many rese...
We characterize the role of coherent nanoscale B2 Ni50Al50 precipitates on temperature- and stress-induced martensitic phase transformation in nanocrystalline Ni63Al37 shape memory alloys using multi-million-atoms molecular dynamics (MD) simulations. studied two types precipitates: one with single crystal (SXP) a second where grain boundaries cut through (PXP). Simulations reveal that presence ...
Crystallization processes are always accompanied by the emergence of multiple intermediate states, of which the structures and transition dynamics are far from clarity, since it is difficult to experimentally observe the microscopic pathway. To insight the structural evolution and the crystallization dynamics, we perform large-scale molecular dynamics simulations to investigate the time-depende...
Recently, the additive manufacturing (AM) technology laser metal deposition (LMD) has gained a lot of attention for processing crack prone high temperature materials such as nickel-based superalloys or intermetallics. A feasibility study on LMD graded transition from binary ß-NiAl to Ni50Al42Ta8 is presented with aim show possibility ß-NiAl-based structures spatially resolved microstructure and...
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