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New Al2O3–Cu–Ni functionally graded composites manufactured using the centrifugal slip casting
International Journal of Applied Ceramic Technology ( IF 1.8 ) Pub Date : 2020-07-21 , DOI: 10.1111/ijac.13594
Justyna Zygmuntowicz 1 , Joanna Szymańska 2 , Marcin Wachowski 3 , Michał Gloc 1 , Waldemar Kaszuwara 1
Affiliation  

The aim of this paper was to establish the general suitability of the centrifugal slip casting technique for fabrication of graded material from the Al2O3–Cu–Ni system. The present investigation is a preliminary one and the obtained results may be regarded as a point for acquiring the new knowledge in the ternary ceramic metal system fabricated using centrifugal slip casting. The rheological study provided the evidence that the suspension used to fabricate composites is a non‐Newtonian slurry. Moreover, the results demonstrated that the prepared slurry is stable over time. The obtained composites has a hollow cylindrical shape with relative density of > 95%. The XRD study results revealed three phases: Al2O3, Ni, and CuNi. The microscopic investigations revealed a nonhomogeneous distribution of the metallic phase in the composite. It has been shown that the content of the metallic phase decreased with the increased distance from the outside to the inner edge of the ceramic‐metal composite. The study results allow to conclude that the interface between the phases is more continuous when sintering was carried out in a solid phase. However, it was found that when sintering was carried out in a liquid phase separated metal particles with spherical phase are formed.

中文翻译:

使用离心滑铸法生产的新型Al2O3-Cu-Ni功能梯度复合材料

本文的目的是确定离心滑模铸造技术对于由Al 2 O 3 -Cu-Ni体系制备梯度材料的一般适用性。本研究只是初步的研究,所获得的结果可作为获取使用离心滑铸法制备的三元陶瓷金属系统中新知识的重点。流变学研究提供了证据,证明用于制造复合材料的悬浮液是非牛顿浆液。此外,结果表明所制备的浆料随时间稳定。所得复合材料为空心圆柱体,相对密度> 95%。XRD研究结果显示出三个阶段:Al 2 O 3,Ni和CuNi。微观研究表明,复合物中金属相的分布不均匀。结果表明,金属相的含量随着陶瓷-金属复合材料从外缘到内缘的距离的增加而降低。研究结果可以得出结论,当在固相中进行烧结时,相之间的界面更加连续。然而,发现当在液相中进行烧结时,形成了分离的具有球形相的金属颗粒。
更新日期:2020-07-21
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