METHODS OF ANALYSIS OF METAL REFRACTORIES BORIDES, CARBIDES AND NITRIDES OF HAFNIUM NIOBIUM, TANTALUM, TITANIUM AND ZIRCONIUM.

Abstract : The metallurgical program for which this laboratory provides analytical service has been primarily concerned with the borides, carbides, and nitrides of hafnium, niobium, tantalum, titanium, and zirconium. The recent production of purer and more complex materials and the correlation of physical properties and chemical reaction behavior with sample composition have revealed the need for modieication and improvement of some of the analytical procedures heretofore used. This report outlines the methods this laboratory uses routinely. Full details of major improvements in technique and new approaches that have evolved are given in appendices. (Author)