High-Throughput Determination of Interdiffusivities for Ni-Al-Cr Alloys at 1173 K through a Combination of Diffusion Multiple and Numerical Inverse Method

Abstract

In this report, a combination of the diffusion multiple technique and the recently developed numerical inverse method was employed for a high–throughput determination of interdiffusivity matrices in Ni–Al–Cr alloys. A face–centered cubic (fcc) quinary Ni–Al–Cr diffusion multiple at 1173 K was carefully prepared by means of the hot–pressing technique. Based on the composition profiles measured by the field emission electron probe micro analysis (FE–EPMA), the composition–dependent interdiffusivity matrices in ternary Ni–rich Ni–Al–Cr system at 1173 K were then efficiently determined using the numerical inverse method.

Interdiffusion Databanks of γ, γ′ and β Phases in NiAl-Based Ternary Systems

“…1 summarizes the interdiffusivities of γ phase in ternary Ni-Al-X systems measured by means of sing-phase diffusion couple/multiple techniques in combination of Matano-Kirkaldy method (and also its variants) or numerical inverse method. Up to now, 14 ternary systems have been investigated, including Ni-Al-Co [40][41][42], Ni-Al-Cr [43][44][45][46], Ni-Al-Ir [47], Ni-Al-Mn [48], Ni-Al-Mo [42,49], Ni-Al-Nb [50], Ni-Al-Os [47], Ni-Al-Pt [51], Ni-Al-Re [47,[52][53][54][55], Ni-Al-Rh [47], Ni-Al-Ru [53], Ni-Al-Ta [29,47], Ni-Al-Ti [56] and Ni-Al-W [47,52,53].…”

“…One more example for demonstration here is also the very recent work from Zhang's group on high-throughput measurement of interdiffusivity matrices in Ni-rich fcc Ni-Al-Cr alloys at 1173 K by utilizing the diffusion multiple technique in combination with the numerical inverse method [46]. For the first step, one Ni-rich fcc Ni-Al-Cr diffusion multiple, Ni-9.8 at.% Al-10.9 at.% Cr/Ni-9.7 at.% Al/Ni-22 at.% Cr/Ni-9.8 at.% Al-10.9 at.% Cr/Ni, were prepared by following the strategy illustrated in Fig.…”

“…4 Originally from Chen and Zhang. [46] Based on the measured composition profiles, the ternary interdiffusivities in Ni-rich Ni-Al-Cr system at 1173 K were effectively evaluated by means of the numerical inverse method. The results are displayed in 3-D planes in Fig.…”

“…Backscattered electron image for the microstructure of the fcc Ni-Al-Cr diffusion multiple annealed at 1173 for 648 ks. Originally from Chen and Zhang [46].…”

“…Fig. 11 3-D interdiffusivity surfaces for Ni-rich fcc ternary Ni-Al-Cr alloys at 1173 K. Originally from Chen and Zhang [46]. …”