Creep properties of dense micro-nanostructured TaC layer
Creep properties of dense micro-nanostructured TaC layer
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致密微纳结构TaC层的蠕变性能
DOI：
10.1088/2053-1591/ab13e9
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发表时间：
2019-04
影响因子：
2.3
通讯作者：
Zhengxin Lu
中科院分区：
文献类型：
--
作者：
Nana Zhao;Xin Wang;Yurong Zhao;Yiqi Wei;Yunhua Xu;Zhengxin Lu
以高纯钽片为原料，在灰铸铁（HT 300）表面原位沉积微纳米结构致密TaC陶瓷层。利用扫描电镜和X射线衍射仪分析了TaC陶瓷层的显微结构和相组成。采用纳米压痕技术测试了材料的蠕变性能。TaC涂层是致密的，颗粒尺寸范围从纳米到微米级。涂层表面仅由TaC组成。然而，纵向截面的XRD表明存在Ta、TaC、Fe 3C、α-Fe和石墨。在一定的保持时间和加载速率下，保持载荷（最大深度）越大，材料的蠕变位移越大。该纳米结构TaC致密陶瓷在不同深度处的蠕变应力指数范围为8.79 ± 1.39。蠕变应力指数与埋深之间没有显著的相关性，表明TaC的蠕变性能应同时考虑蠕变变量和蠕变应力指数。
Micro-nanostructured dense TaC ceramic layer was in site deposited on Grey cast iron (HT300) surface using high-purity tantalum plate as a raw material. Microstructure and phase composition TaC ceramic layer were analyzed by scanning electron microscopy and x-ray diffraction (XRD). Creep properties were tested by nanoindentation technique. TaC coating was dense with particle sizes ranging from nano-to micro-meter scale. Surface of the coating consisted only of TaC. However, XRD of the longitudinal-section indicated presence of Ta, TaC, Fe3C, α-Fe and graphite. At certain holding times and loading rates, the larger the holding load (maximum depth), the greater the creep displacement of the material was. The range of creep stress index of this nanostructure TaC dense ceramic at different depths was 8.79 ± 1.39. No significant relationship between the depth and creep stress index was determined, which indicated that creep properties of TaC should be considered in terms of both creep variable and creep stress index.
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DOI：
10.1016/j.msea.2009.01.066
发表时间：
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影响因子：
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