Microstructure and Strength of the Ta Cladded W Targets Prepared by Hot Isostatic Pressure (Hip) Diffusion Welding

Tantalum (Ta) coated tungsten (W) targets were prepared by hot isostatic pressure (HIP) diffusion welding in the temperature range from 1250 °C to 1550 °C. The mechanical tensile properties displayed that the bonding strength of the W-Ta interface reached the maximum value of 139.9 MPa at 1450 °C. The value of nanoindentation hardness values of the W-Ta interface are between the values of W and Ta substrates indicating the diffusion layer. W-Ta diffusion layers were formed during the HIP, and the thickness of diffusion layers increased with the increase of the HIP temperature. TEM results show that the diffusion layer consists of W-Ta solid solution, and crystal plane distances of the diffusion layers were slightly enlarged due to the W-Ta solid solution.

Keywords: Diffusing welding, Tantalum cladded tungsten, Hot isostatic pressure, spallation neutron target

Suggested Citation: Suggested Citation

Wei, Shaohong and Wang, Bingfeng and Song, Peng and Yin, Wen and Zhang, Ruiqiang and Liang, Tianjiao, Microstructure and Strength of the Ta Cladded W Targets Prepared by Hot Isostatic Pressure (Hip) Diffusion Welding. Available at SSRN: https://ssrn.com/abstract=4441271 or http://dx.doi.org/10.2139/ssrn.4441271