The Study on Thermal Expansion of Ceramic Composites with Addition of ZrW2O8
The Study on Thermal Expansion of Ceramic Composites with Addition of ZrW2O8
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DOI：
10.1088/1757-899x/116/1/012030
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
E. Dedova;V. Shadrin;M. Petrushina;S. Kulkov
中科院分区：
文献类型：
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作者：
E. Dedova;V. Shadrin;M. Petrushina;S. Kulkov
研究了用纳米级初始粉末制备的（Al_2 O_3 - 20 wt% ZrO_2）-ZrW_2 O_8陶瓷复合材料的结构、相组成和热性能。复合材料抛光后表面有均匀分布的白色颗粒。复合材料的物相组成为四方相、单斜相ZrO 2和两种ZrW 2 O 8变体（四方相和立方相）。测定了复合材料的线性热膨胀系数。实验和计算得到的复合材料的热膨胀系数值的差异可能是由于相变，结构的特点，由于热膨胀失配，这有助于显着的陶瓷复合材料的热膨胀的内应力。
The studies on structure, phase composition and thermal properties of (Al2O3 - 20 wt% ZrO2) - ZrW2O8 ceramic composites obtained using nanosized, initial powders were conducted. Homogeneously distributed white particles on the polished surface of composites were observed. Phase composition of the composites was represented with corundum, monoclinic ZrO2 and two modifications of ZrW2O8 (tetragonal and cubic). Linear thermal expansion coefficient values of the composites were determined. The difference in experimental and calculated coefficient of thermal expansion values for composites obtained may be attributed to phase transformations, features of the structure, internal stresses due to thermal expansion mismatch, which contribute significantly to thermal expansion of the ceramic composites.