Erosion and mechanical properties of hydrothermally-resistant nanostructured zirconia components
Erosion and mechanical properties of hydrothermally-resistant nanostructured zirconia components
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DOI：
10.1016/j.ceramint.2018.03.074
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发表时间：
2018-06
影响因子：
5.2
通讯作者：
S. Saremi-Yarahmadi;J. Binner;B. Vaidhyanathan
中科院分区：
文献类型：
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作者：
S. Saremi-Yarahmadi;J. Binner;B. Vaidhyanathan
采用工业上可行的干压工艺制备了大尺寸50 × 50 mm烧结纳米氧化锆陶瓷。绿色体烧结的两个阶段的过程和优化的烧结条件的报告。通过浆体冲蚀磨损试验研究了纳米氧化锆在石化阀门中的应用。氧化锆表现出60倍的改善相比，常用的钨铬钴合金涂层的商业不锈钢试样在测试条件下，而没有四斜晶系到单斜相的转变后，观察侵蚀。增强的性能也是有效的相比，氧化铝和氧化锆组件的耐腐蚀性能的36和3倍，分别。这表明纳米结构氧化锆作为一种潜在的强大的替代材料，用于建造石化阀门的内部装饰组件。
Large scale 50 × 50 mm sintered nanostructured zirconia ceramics were fabricated via industrially viable dry pressing routes. The green bodies were sintered by a two-stage process and the optimised sintering conditions are reported. The suitability of nanostructured zirconia for demanding applications in petrochemical valve components was investigated by slurry impingement erosion experiments. Zirconia showed a 60-fold improvement compared to commonly used stellite-coated commercial stainless steel specimens under test conditions while no tetragonal to monoclinic phase transformation was observed after erosion. The enhanced performance was also valid when compared with reported erosion resistant properties of alumina and zirconia components by a factor of 36 and 3, respectively. This suggests nanostructured zirconia as a potential robust alternative material for construction of internal trim components of petrochemical valves.