Densification process in fabrication of PSZ-Ti composites by spark plasma sintering technique
Densification process in fabrication of PSZ-Ti composites by spark plasma sintering technique
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DOI：
10.1016/j.matchar.2017.08.016
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发表时间：
2017-10
影响因子：
4.7
通讯作者：
T. Shinohara;T. Fujii;K. Tohgo;Y. Shimamura
中科院分区：
文献类型：
--
作者：
T. Shinohara;T. Fujii;K. Tohgo;Y. Shimamura
研究了放电等离子烧结（SPS）制备部分稳定氧化锆（PSZ）-纯钛（Ti）复合材料的致密化过程。在给定的阶段终止的烧结计划，以制造一个完全烧结的压块，和半烧结的压块进行了制造，以检查其致密化过程中，从他们的微观结构，密度和创建的反应相的观点。PSZ-Ti复合材料的致密化在烧结早期处于整体Ti和PSZ之间的中间状态，然后在烧结后期变得比整体Ti和PSZ慢。此外，在富Ti复合材料中的烧结比在富PSZ复合材料中慢。根据XRD分析，PSZ-Ti复合材料中的Ti相在800 °C以上氧化，与Ti体积分数无关。这些结果表明，由于元素扩散和PSZ和Ti的粉末粒度的差异，钛氧化物的生成影响PSZ-Ti复合材料的致密化过程。
Densification process in the fabrication of partially stabilized zirconia (PSZ) - pure titanium (Ti) composites by spark plasma sintering (SPS) technique was discussed. The sintering schedule to fabricate a fully-sintered compact was terminated at given stages, and semi-sintered compacts were fabricated to examine their densification process from viewpoints of their microstructure, density and creation of reaction phases. The densification of PSZ-Ti composites progressed in an intermediate manner between the monolithic Ti and PSZ at an early stage of sintering, and then became slower than the monolithic Ti and PSZ at the final stage. Moreover, the sintering was slower in the Ti-rich composite than in the PSZ-rich composite. According to XRD analysis, Ti phase in the PSZ-Ti composites oxidized over 800 °C, irrespective of Ti volume fraction. These results revealed that the creation of Ti oxide due to element diffusion and the difference in powder size of PSZ and Ti affected the densification process of PSZ-Ti composites.