Abstract
ABSTRACTThe Microstructural Transition From The Epitaxial Crystalline To Amorphous State As A Function Of Ni Concentration Is Examined In Al(Ni) Alloys Formed By Ion Implantation And E-Beam Melt Quenching. The Evolution From Epitaxial Crystalline Al At ≲ 3.5 At.% Ni To Amorphous Phase Formation At 15–30 At.%Ni Is Characterized In Detail For 8, 10 And 12% Ni Uniform Concentration Samples By Ion Channeling And Transmission Electron Microscopy. The Transition Occurs Via Complete Loss Of Epitaxial Regrowth At 9 At.% And The Formation Of A Finegrained Polycrystalline Al, With Grain Size Decreasing With Increasing Ni From 20–100 Å At 10% Ni Concentration To ≲ 10–50 Å At 12% Ni.
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