Auger electron microscopy (AES) analysis of boron doped Ni3Al have shown boron segregation at grain boundary (GB). Boron segregation was enhanced with increasing bulk boron content independent of stoichiometry, suggesting that hypo-stoichiometric alloy is intrinsically ductile even without boron. A slight Ni cosegregation is confirmed using atom probe field ion microscope (APFIM). In Ni3(Si,Ti), no distinct composition fluctuation was identified between matrix and GB vicinity. These results suggest that atomic bonding atmosphere modification from covalent to metallic in the vicinity of GB is one of factors to modify ductility for L12-type intermetallics.
|ジャーナル||Materials Research Society Symposium - Proceedings|
|出版ステータス||Published - 1995 1月 1|
|イベント||Proceedings of the 1994 MRS Fall Meeting - Boston, MA, USA|
継続期間: 1994 11月 28 → 1994 11月 30
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