Interdiffusion in L12-Ni3Al Alloyed with Re
نویسندگان
چکیده
منابع مشابه
INITIAL STUDIES OF B-DOPED AND ALLOYED Ni3Al
As part of an extended program to study the fine scale chemistry of the matrix and grain boundary area of doped and alloyed Ni3A1, experiments were initiated to determine the effects of various atom probe parameters on the accuracy of measured concentrations. Samples of arc-melted as well as rapidly cooled Ni3A1 containing boron, iron and hafnium were used. The distribution of solutes in the ma...
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We report the results of several experiments isolating the effect of long-range order on mechanical properties of intermetallic compounds. Kinetically disordered FCC Ni3Al (Ni 76%) thin films were produced by rapid solidification following pulsed laser melting. For comparison, compositionally and microstructurally identical films with ordered L12 structure were produced by subsequent annealing ...
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We have studied by Spot Profile Analysis Low Energy Electron Diffraction (SPALEED) and Auger Electron Spectroscopy (AES) Ni-Al alloyed layers formed by annealing, around 780 K, Al deposits on a stepped Ni(111) surface. The surface structure and composition of the thin epitaxial Ni3Al and NiAl films, obtained respectively below and above a critical Al initial coverage c θ , differ markedly from ...
متن کاملDislocation mechanisms of creep in Ni3Al
The compressive creep deforrn;~tiort microstructure of polycrystalline Ni3AI h:is been observed by transnlission electron microscopy (TEM). ( 1 1 I ) rind ( 110) slip systems have been identified in primary creep. Dissociatiort of edge superparti:~l pairs perpendicular to the slip plane (both { 11 1 ) and ( 110) ) is common in crept specimens. I'he formation of this superdislocation...
متن کاملFIRST PRINCIPLES COMPUTATIONS Effects of temperature and ferromagnetism on the c-Ni/c-Ni3Al interfacial free energy from first principles calculations
The temperature dependencies of the c(f.c.c.)Ni/c-Ni3Al(L12) interfacial free energy for the {100}, {110}, and {111} interfaces are calculated using firstprinciples calculations, including both coherency strain energy and phonon vibrational entropy. Calculations performed including ferromagnetic effects predict that the {100}-type interface has the smallest free energy at different elevated tem...
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ژورنال
عنوان ژورنال: Journal of Phase Equilibria and Diffusion
سال: 2009
ISSN: 1547-7037,1863-7345
DOI: 10.1007/s11669-009-9499-9