ملخص: The work described in this thesis is concerned with the application of the position annihilation technique to the study of defects and phase transformation in alloys. Following a brief introduction (chapitreI) a general review of the basic physics and techniques of the positron methos is presented in chapter 2. The practical aspects of the particular methods used in this work are discussed in chapter3. In chapter 4 results concerning the temperatrure dependence of various annihilation parametrers in In-Pb, and Ob-Sn alloys are presented. The data show evidence of pronounced effects at solid-solid phase boundaries and of variations in apparent vacancy formation energy both within particular phases and at their boundaries.

طبعة: Norwich: University of East Anglia
لغة: إنجليزية
الوصف المادي: 132 p. ill. ;30 cm
الشهادة: Ph.D
مؤسسة مناقشة الرسالة: University of East Anglia

ملاحظة: Bibliogr.pp.126-132