高强度氧化钪陶瓷的制备技术研究

发布时间：2018-05-06 14:32

本文选题：ScO + 真空烧结　；参考：《稀有金属》2017年02期

【摘要】：采用纯度4N以上(纯度99.99%)的Sc_2O_3为原料,分别通过真空烧结、热压烧结、热压预烧结和热等静压烧结相结合的方法制备了Sc_2O_3陶瓷。分别采用阿基米德法、扫描电镜(SEM)和万能试验机等对上述3种方法制备的Sc_2O_3陶瓷的密度、抗压强度和微观形貌进行分析。研究结果表明:通过真空烧结制备的Sc_2O_3陶瓷密度高达3.80 g·cm-3,抗压强度为460 MPa;利用热压烧结制备的Sc_2O_3陶瓷密度为3.72 g·cm-3,抗压强度为1100 MPa;通过热压预烧结和热等静压烧结相结合制备的Sc_2O_3陶瓷密度为3.84 g·cm-3,抗压强度高达1900MPa。在提高Sc_2O_3陶瓷密度的前提下,减小烧结体的晶粒可以显著提高其抗压强度。因此,采用热压预烧结和热等静压烧结相结合制备的Sc_2O_3陶瓷可以满足特殊使用的要求。
[Abstract]:Sc_2O_3 ceramics were prepared by vacuum sintering, hot pressing presintering and hot isostatic pressing sintering using Sc_2O_3 with purity of more than 4 N (purity 99.99%). The density, compressive strength and microstructure of Sc_2O_3 ceramics prepared by Archimedes method, scanning electron microscope (SEM) and universal testing machine were analyzed. The results show that the density and compressive strength of Sc_2O_3 ceramics prepared by vacuum sintering are as high as 3.80 g / cm ~ (-3), and the compressive strength of Sc_2O_3 ceramics prepared by hot pressing sintering are 3.72 g / cm ~ (-3) and 1100 MPA respectively, and the density of Sc_2O_3 ceramics prepared by hot pressing sintering is 3.72 g / cm ~ (-3), and the compressive strength is 1100 MPA by hot pressing pre-sintering and hot isostatic pressing sintering. The density of Sc_2O_3 ceramics was 3.84 g / cm ~ (-3), and the compressive strength was up to 1900 MPA. On the premise of increasing the density of Sc_2O_3 ceramics, the compressive strength can be significantly improved by decreasing the grain size of the sintered body. Therefore, the Sc_2O_3 ceramics prepared by hot pressing presintering and hot isostatic pressing sintering can meet the requirements of special use.
【作者单位】：核工业标准化研究所反应堆工程与仪表室;中国原子能科学研究院反应堆工程研究设计所;北京有色金属研究总院稀有金属冶金材料研究所;浙江锆谷科技有限公司;
【基金】：国家国防科技工业局技术基础项目(B0120120300)资助
【分类号】：TQ174.758.11

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