Date of Award
11-1974
Degree Type
Thesis
Degree Name
Master of Engineering (ME)
Department
Metallurgy and Materials Science
Supervisor
P.S. Nicholson
Abstract
Pure and doped CaF₂ single crystals were grown from melts by Czochralski technique. The doped crystals contained two levels of Na⁺, K⁺, V³⁺ and Y³⁺ impurities. The crystals were subsequently annealed and analysed for impurities. Samples were mechanically tested in compression at 450 and 600°C, and the 0.1% proof stress noted. An attempt was made to explain the observed hardening by Fleischer's theory of solid solution hardening in the case of V³⁺ and Y³⁺ -doped CaF₂ and by precipitation hardening theory in the case of Na⁺ and K⁺ -doped crystals.
Recommended Citation
Cingi, Celal, "Effect of Impurities on the Strength of CaF₂ Single Crystals" (1974). Open Access Dissertations and Theses. Paper 2646.
http://digitalcommons.mcmaster.ca/opendissertations/2646