[T10] Other Processing

[16P-T10-01] Enhancing Mechanical and Thermal Shock Resistance Properties of W/W-10Cu Joints through a Novel Pre-oxidation Treatment and Infiltration Method

D. Xu¹, R. Zhou¹, K. Fu¹, P. Chen^1,2,3, Q. Xu⁴, *J. Cheng^1,2,3 (1.School of Materials Science and Engineering, Hefei University of Technology, China, 2.Research Center for Powder Metallurgy Engineering and Technology of Anhui Province, China, 3.Engineering Research Center of High-Performance Copper Alloy Materials and Processing, Ministry of Education, China, 4.Institute for Integrated Radiation and Nuclear Science, Kyoto University, Japan)

Keywords:W/W-10Cu joints; Oxidation treatment; Infiltration; Microstructure; Thermal shock resistance

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.