Deoxidation and Subsequent Densification of Sintered Titanium by Ca Deoxidizer

In this study, a sintering process involving simultaneous deoxidation and sintering was developed, using the vapor of a deoxidizer (Ca) to produce low-oxygen, high-density titanium. Compared to a series of reference titanium powder samples, the bodies sintered with Ca exposure had an similar to 1,400 ppm lower oxygen content, resulting in an similar to 2% increase in their density. This appears to be the result of decreased surface oxidation on the titanium, as increased oxidation suppresses densification at high sintering temperatures. The effect of the Ca deoxidizer was a lower oxidation, thereby increasing the sintered density. The Vickers hardness of sintered bodies from both experiments increased from an initial value of similar to 249 Hv at 900 degrees C to similar to 286 Hv at 1,400 degrees C, respectively. Moreover, both experiments revealed a tensile strength of similar to 170 MPa at 900 degrees C that fmally increased to similar to 218 MPa at 1,400 degrees C. Meanwhile, the bodies sintered with Ca, the elongation was on average over 1% higher than contrary samples.