Enhancing Mechanical and Thermal Shock Resistance Properties of W/W-10Cu Joints through a Novel Pre-oxidation Treatment and Infiltration Method

Abstract

By oxidation-reduction treated to roughen its surface of W, combined with the infiltration method, to enhance bonding with W-10Cu. The effects of the oxidation temperature on the interfacial microstructure, mechanical property and thermal shock performance of W/W-10Cu joints were investigated. The results demonstrate that oxidation treatment notably enhances the microstructural quality and increases the contact area between W and W-10Cu, thereby strengthening the mechanical interlocking force. At an oxidation temperature of 900 °C, the joints achieve a maximum shear strength of 295.3 MPa. Moreover, the oxidation process effectively mitigates the expansion of cracks following thermal shock. Despite a general reduction in shear strength post thermal shock, joints treated with oxidation at 900 °C showed the least decline, maintaining a strength of 240.7 MPa. These findings substantiate the critical role of oxidation treatment in enhancing the performance of W/W-10Cu joints.