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Influence of dissolution of oxygen on absorption capability of a surface of tantalum

This research shows the changes of the absorption ability of the surface of tantalum foil when it is heated by means of continuous-wave CO/sub 2/ laser in the air at temperature 600/spl deg/C - 650/spl deg/C. The absorption ability of the sample (when it was completely cooled down after the laser heating) is evaluated by measuring the slope angle of the foil surface temperature growth under the testing laser beam. This study also performed experiments where the heating of one sample is interrupted at definite period of time and the magnitude of absorption capacity is measured. The measurement of Wickers microhardness in surface districts which had undergone laser heating is also conducted.