以造粒钼粉为原料，通过冷等静压成形得到坯体，在氢气气氛中进行烧结，烧结温度为1700-1950℃，保温时间为10小时，再经多道次轧制得到钼板，最终加工变形量为75%。测试非金属杂质元素C、N、O在钼中的分布规律。3DAP采集方案：将样品线切割成10 mm×10 mm×2 mm的小块，配置10 vol.%铁氰化钾+10 vol.%氢氧化钠的水溶液，对样品进行化学腐蚀。在双束扫描电镜下沿着样品晶界位置切割出尖端曲率半径小于100 nm的APT检测样品，再通过基座转移至三维原子探针仪进行测试，脉冲速度为200kHz，横向和深度分辨率分别为0.2nm，0.1nm，采集速度为2×106离子/分钟，实验温度控制在25K。

Taking granulated molybdenum powder as the raw material, the green body is obtained by cold isostatic pressing, and sintered in a hydrogen atmosphere at a sintering temperature of 1700-1950°C and a holding time of 10 hours. The molybdenum plate is obtained through multiple passes of rolling. The final processing deformation is 75%. Test the distribution of non-metallic impurity elements C, N, O in molybdenum. 3DAP collection scheme: Cut the sample wire into small pieces of 10 mm×10 mm×2 mm, configure a 10 vol.% potassium ferricyanide + 10 vol.% sodium hydroxide aqueous solution, and chemically corrode the sample. Under the dual-beam scanning electron microscope, an APT test sample with a tip curvature radius of less than 100 nm is cut along the grain boundary of the sample, and then transferred to the three-dimensional atom probe through the base for testing. The pulse speed is 200kHz, and the lateral and depth resolutions are respectively. It is 0.2nm, 0.1nm, the collection speed is 2×106 ions/min, and the experiment temperature is controlled at 25K.