Preparation method of Ti powder with oxygen concentration of <1000 ppm using Ca

Abstract

To reduce the high oxygen concentration of commercial Ti powder and to obtain Ti powder with the oxygen concentration of <1000 ppm, we utilised two types of deoxidation pots to conduct deoxidation experiments: below the melting point of Ca using a contact deoxidation pot (experiment A), and above its melting point using a non-contact deoxidation pot (experiment B). To obtain Ti in powder form even after deoxidation above the melting point of Ca, we developed a new non-contact deoxidation pot in the experiments. In experiment A, the oxygen concentration in the Ti powder decreased down to 50% compared with the initial stage (2200 ppm). In experiment B, the oxygen concentration reduced to ∼63% at the deoxidation temperature of 1000°C. As a result, Ti powder with 820 ppm of oxygen concentration could be prepared using the non-contact deoxidation pot with Ca.