CHARACTERIZATION OF THE INTERDIFFUSION MICROSTRUCTURE, A15 LAYER GROWTH AND STOICHIOMETRY IN TUBE-TYPE Nb3Sn COMPOSITES (original) (raw)

4.4.2 Comparison of the Analytical Model and Experimental Data……………..49 4.4.3 Effect of Temperature on the Coarse/Fine A15 phase fractions…………...54 Chapter 5 : COMPOSITIONAL AND MICROSTRUCTURAL ANALYSIS OF THE A15………………………………………………………………………………...55 5.1 Introduction………………………………………………………………………..55 5.2 Effect of Heat Treatment on the A15 Composition…………….…….…………...56 5.3 Effect of the Initial Sn/Cu Ratio on the A15 Composition………..…………........60 5.4 Analysis of the Cu Levels in the A15 with Temperature…………………….........61 5.5 Grain Growth and Morphology of the A15………………………...…………......62 5.6 Activation Energy for Grain Growth……………….………………………..……66 5.7 Strand Properties J c and B c2 ………………………………………………….……68