一种纳米复合氧化物弥散强化钼合金及其制备方法

本发明公开了一种纳米复合氧化物弥散强化钼合金及其制备方法,属难熔金属基复合材料领域。以钼金属元素粉,Y2O3粉和Mo2Zr合金元素粉为原料,将合金成分按比例均匀混合封装,在高纯氩气气氛中采用高能球磨将Y2O3与Zr固溶于钼基体中,制备复合粉体,然后经放电等离子烧结进行粉体固化,析出纳米Zr-Y-O复合氧化物,制备纳米复合氧化物弥散强化钼合金。本发明利用Y2O3的固溶再析出机制,通过添加Zr元素与Y元素、游离氧反应形成具有萤石结构的Zr-Y-O复合氧化物,在清除钼基体游离氧的同时,将氧化物颗粒细化至5~30nm;且原位析出的氧化物颗粒与钼基体具有共格/半共格关系,且大多在晶粒内分布,起到沉淀强化...

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Zusammenfassung:本发明公开了一种纳米复合氧化物弥散强化钼合金及其制备方法,属难熔金属基复合材料领域。以钼金属元素粉,Y2O3粉和Mo2Zr合金元素粉为原料,将合金成分按比例均匀混合封装,在高纯氩气气氛中采用高能球磨将Y2O3与Zr固溶于钼基体中,制备复合粉体,然后经放电等离子烧结进行粉体固化,析出纳米Zr-Y-O复合氧化物,制备纳米复合氧化物弥散强化钼合金。本发明利用Y2O3的固溶再析出机制,通过添加Zr元素与Y元素、游离氧反应形成具有萤石结构的Zr-Y-O复合氧化物,在清除钼基体游离氧的同时,将氧化物颗粒细化至5~30nm;且原位析出的氧化物颗粒与钼基体具有共格/半共格关系,且大多在晶粒内分布,起到沉淀强化的作用,可显著提高力学性能与抗辐照性能。 The invention discloses a nanometer composite oxide dispersion strengthening molybdenum alloy and a preparation method thereof, and belongs to the field of refractory metal matrix composite materials. Molybdenum metal element powder, Y2O3 powder and Mo2Zr alloy element powder serve as raw materials, alloy components are evenly mixed and packaged in proportion, Y2O3 and Zr are dissolved in a molybdenum matrix in a solid mode in a high-purity argon atmosphere by the adoption of high-energy ball milling, composite powder is prepared, then powder curing is conducted through spark plasma sintering, nanometer Zr-Y-O composite oxide is separated out, and the nanometer composite oxide dispersion streng