The W-0.25 wt%Al₂O₃ alloy was fabricated by a powder metallurgy processing route, including hydrogen reduction, induction sintering and hot swaging. Al₂O₃ particles are absorbed on the surface of W particles with size ranging from 50 to 1000 nm. The microstructure of sintered alloy presents equiaxed grains with an average size of 8.6 μm and TEM result shows that a semi-coherent relationship exists in between W and Al₂O₃. After swaging, the swaged W-0.25 wt%Al₂O₃ alloy with fully dense was obtained. EBSD result indicates most of grains are obviously elongated and the average aspect ratio of W grains is 2.3:1. There is an obvious transition layer with a thickness of approximately 20 nm between W and Al₂O₃. The interface displays an amorphous feature because of uncoordinated deformation occurred in swaging process. 3-point bend tests show that the ductile-to-brittle transition temperature of sintered alloy is in the range of 350–400 °C. Moreover, the swaged alloy begins to exhibit obvious ductile behavior at 100–200 °C and the bending strength increases with increasing temperature, which reaches a maximum value of 1762 MPa at 400 °C.

W-0.25 wt%Al ₂ O ₃合金采用粉末冶金工艺路线制备，包括氢还原、感应烧结和热锻造。Al ₂ O ₃颗粒吸附在W颗粒表面，粒径范围为50～1000 nm。烧结合金显微组织呈等轴晶粒，平均粒径为8.6 μm，TEM结果表明W与Al ₂ O ₃之间存在半共格关系。型锻后，型锻 W-0.25 wt%Al ₂ O ₃得到完全致密的合金。EBSD结果表明大部分晶粒明显拉长，W晶粒的平均纵横比为2.3:1。_{W和Al 2} O ₃之间有一个明显的过渡层，厚度约为20 nm 。由于型锻过程中发生不协调的变形，界面呈现出无定形特征。三点弯曲试验表明，烧结合金的韧脆转变温度在 350-400 ℃范围内。此外，型锻合金在 100~200 ℃开始表现出明显的延展性，弯曲强度随温度升高而增加，在 400 ℃时达到最大值 1762 MPa。