Systematics of Metastable Alloys Produced by Ion Implantation
For several years, attempts have-been made to understand the physical and chemical factors-which determine * SUBSTITUTIONAL AND/O the final state of alloys of the elements prepared by 70 STETRAHEDRAL ion-implantation. How parameters such as the soltte atomic size, electronegativity and metallurgical soluU OCTAHEDRAL bility in the solvent affect the substitutional or interstitial nature of the alloy and its final crystalOPEN SYMBOLS PREDICTE interstitial nature ~~~~~~~~SOLID SYMBOLS OBSERVED line state is still largely an open question. The influence of ballistic processes' such as radiation 6.0 induced defects and replacement collisions also needs clarification. Experiments,cited here, on the lattice o OCTAHEDRAL location of some 25 solute.elements as implanted in Be X metal have provided insight into the interplay of the various properties of the solute and the implantation Z w process itself. 50a. As Beryllium metal is an ideal host material for the J 4 Ge oC study of the factors influencing the final site of an b Ag implanted impurity element. The very low mass of the 4 A/ Be atom guarantees that medium' to high mass implanted I Pb n u impurities cannot undergo a replacement collision at 4.0Ga the end of range. This is simply a result of the T In puo