| Title |
Short Range Order in Amorphous Ni - Zr Alloys |
| Authors |
이덕열(Dok Yol Lee); 박기선(Ki Seon Park) |
| Abstract |
Amorphous Ni_xZr_(100-x)(35≤×≤75) powders were produced by mechanical alloying of elemental powders and the short range order of the amorphous Ni_(35)Zr_(65), Ni_(45)Zr_(55), Ni_(55)Zr_(45) and Ni_(65)Zr_(35) alloys was characterized using X-ray diffraction. The partial interference functions, I_(NiNi)(K), I_(NiZr)(K) and I_(ZrZr)(K), were calculated from the total interference functions of the latter three alloys. The nearest neighbor distances for Ni-Ni, Ni-Zr and Zr-Zr atomic pairs in the amorphous Ni-Zr mechanical alloys turned out to be 2.400 2.654 and 3.282Å, respectively. The coordination number was 12.4∼12.9 depending on the composition. It was concluded that the atoms in the amorphous Ni-Zr alloys didn`t behave like hard spheres and arrange themselves almost randomly even though there seemed to be a little tendency of preference for like neighbors. The total reduced atomic distribution functions of the amorphous Ni_(35)Zr_(65) alloys produced by mechanical alloying and liquid quenching looked alike but some differences were found in their partial functions. |