The use of self-passivating tungsten alloys for the blanket first wall armor of future fusion reactors is advantageous concerning safety issues compared to pure tungsten because in case of a loss-of-coolant accident with simultaneous air ingress, a stable protective scale at high temperatures in presence of oxygen will be created, preventing the formation of volatile and radioactive WO₃. Bulk W-10Cr-0.5Y alloy manufactured by mechanical alloying and hot isostatic pressing (HIP) exhibits a high oxidation resistance compared to pure tungsten. For the production of plasma-facing components, a tungsten alloy layer of a few millimeters has to be joined to reduced activation ferritic-martensitic steel. In this work, diffusion bonding by HIP of W-10Cr-0.5Y alloy to P91 steel was successfully performed, using a 50 μm thick copper interlayer at temperatures of 700 and 980 °C. The joints at 980 °C show good metallic continuity at both interfaces and a high shear strength of 354 MPa. A drop of shear strength to 174 MPa is observed after the tempering required to recover the initial properties of steel. The high shear strength values obtained at 980 °C and the observed fracture mechanisms are indications of the good adhesion obtained both with and without tempering.

与纯钨相比，将自钝化钨合金用于未来聚变反应堆的毯式第一壁装甲在安全性方面具有优势，因为在发生冷却剂损失事故且同时有空气进入的情况下，在高温下具有稳定的保护等级会在氧气存在下产生，从而防止挥发性和放射性WO ₃的形成。与纯钨相比，通过机械合金化和热等静压（HIP）制造的大块W-10Cr-0.5Y合金具有较高的抗氧化性。为了生产面向等离子体的部件，必须将几毫米的钨合金层连接到还原活化的铁素体-马氏体钢上。在这项工作中，成功地使用W-10Cr-0.5Y合金的HIP在700和980°C的温度下使用50μm厚的铜夹层进行了扩散结合。980°C的接头在两个界面处均表现出良好的金属连续性，并具有354 MPa的高剪切强度。在恢复钢的初始性能所需的回火后，观察到剪切强度下降至174 MPa。