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Issue 72, 2017, Issue in Progress
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Temperature-dependent evolution of interfacial zones in SiCf/C/Ti17 composites

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Abstract

The continuous SiC fibre reinforced Ti matrix composites are usually subjected to elevated service temperature, representing a wide range of possible applications relying on the corresponding interfacial stability. SiC fibres coated by a turbostratic C reinforced Ti17 matrix composites (SiCf/C/Ti17) were fabricated and the evolution of interfacial zones subsequently to processing of thermal exposure to distinct conditions: 450 °C/600 h, 800 °C/600 h and 1100 °C/2 h was investigated. The corresponding low-temperature long term and high-temperature short term applications were evaluated. It was discovered that the interfacial zone of the as-processed SiCf/C/Ti17 could be described as turbostratic C||amorphous C||fine-grained TiC||transition TiC||coarse-grained TiC, remaining stable subsequently to 450 °C/600 h of exposure. The same thickness of each sub-layer was observed as the as-processed sample was identified. The 800 °C/600 h thermal treatment induced apparent increment in the coarse-grained TiC sub-layer thickness, reaching twice the as-processed sample increment as well as the grains growth in the fine-grained TiC sub-layer. On the contrast, the 1100 °C/2 h thermal treatment not only induced a remarkable increment in thickness of the coarse-grained TiC sub-layer, but also actuated the grain growth of the fine-grained TiC sub-layer. Consequently, it merged the sub-layer with the transition TiC sub-layer. The diffusion behavior of C atoms activated by different temperatures could be responsible for the aforementioned temperature-dependent evolution of the interfacial zones in the SiCf/C/Ti17.

Graphical abstract: Temperature-dependent evolution of interfacial zones in SiCf/C/Ti17 composites

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Publication details

The article was received on 28 Aug 2017, accepted on 18 Sep 2017 and first published on 22 Sep 2017


Article type: Paper
DOI: 10.1039/C7RA09530A
RSC Adv., 2017,7, 45327-45334
  • Open access: Creative Commons BY-NC license
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    Temperature-dependent evolution of interfacial zones in SiCf/C/Ti17 composites

    M. Wu, K. Zhang, H. Huang, H. Li, M. Wang, S. Zhang, J. Chen and M. Wen, RSC Adv., 2017, 7, 45327
    DOI: 10.1039/C7RA09530A

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