Abstract
The determination of various alloying elements in Ti-base alloys by X-ray fluorescence spectroscopy was investigated in order to develop a rapid quantitative method for the analysis of a large number of samples.
Measurement are made with Fluroprint Mk-II spectrometer, using W-tube rating at 50 kV-20 mA.
The drilled sample is converted to an oxide directly with the ignition in the electric furnace or by chemical treatment. Oxide powder ground under 100 mesh (1 g) is fused with Na2B4O7 (15 g) in Pt crucible to a complete molten glass, which is poured into a graphite mold preheated at 350°∼400°C to form a glass bead. The glass bead has satisfactory homogeneity for X-ray fluorescence analysis, which was proved by the segregation tests of chemical analysis and autoradiography.
Optimum operating conditions for determing Al, Co, Cr, Cu, Fe, Mn, Mo, Nb, Pd, Sn, Ta, V, W and Zr in the concentration from 0.1 to 15% are given. The sensitivity is within 0.1% for heavy elements on the uses of K X-ray spectral lines as the detecting source. The precision is within 5% of the amount present. Results agree well with those obtained by the routine method for chemical analysis and the calibration curves prepared from synthetic standards having a different history, are linear over most of all the concentration range of the analytical elements in various samples.
This study suggests that the method could be applicable easily to the analysis of the other kinds of alloy after some modifications.
