Micro-Raman spectroscopy of indentation induced phase transformation in nanozirconia ceramics
Micro-Raman spectroscopy of indentation induced phase transformation in nanozirconia ceramics
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DOI：
10.1179/1743676110y.0000000016
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发表时间：
2011-02-01
影响因子：
2.2
通讯作者：
Binner, J.
中科院分区：
文献类型：
--
作者：
Paul, A.;Vaidhyanathan, B.;Binner, J.
显微拉曼光谱已被用作一种有效的技术，以确定在纳米结构的氧化钇稳定氧化锆（YSZ）陶瓷与不同的氧化钇含量的相变。样品已经制备了不同的平均晶粒尺寸的粉浆浇注路线，然后由微波辅助的两步烧结循环开始与水性纳米氧化锆悬浮液。使用维氏锥形压头在不同的负载下产生的压痕，并使用显微拉曼光谱映射得到的相变。将结果与商业亚微米3 mol.% YSZ。与具有类似氧化钇含量的亚微米氧化锆相比，纳米氧化锆的转化量低得多。
Micro-Raman spectroscopy has been employed as an effective technique to determine the phase transformations in nanostructured yttria stabilised zirconia (YSZ) ceramics with different yttria contents. Samples have been prepared with varying mean grain sizes by a slip casting route followed by a microwave assisted two-step sintering cycle starting with aqueous nanozirconia suspensions. Indents were generated using a Vickers pyramidal indenter at different loads, and the resulting phase transformations were mapped using micro-Raman spectroscopy. The results were compared to those of a commercial submicrometre 3 mol.% YSZ. The amount of transformation was found to be much lower for nanozirconia compared to the submicrometre zirconia with similar yttria content.