DataVXAdvances in Applied CeramicsPaper
journal article·2018-05-19

Effects of thermal oxidising exposure on the tensile strength of Hi-Nicalon fibres

Shoujun Wu, Laifei Cheng

Advances in Applied Ceramics· Volume 117· Issue 4
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Source abstract

Abstract

Hi-NicalonTM silicon carbide fibre tows were respectively exposed to argon, pure oxygen, and wet oxygen atmosphere at 1300–1500 °C for 1 h. The tensile strength of the Hi-Nicalon fibres decreased dramatically with increasing temperature under all exposure conditions. The most severe deterioration of the tensile strength of the fibres, which occurred under exposure to pure oxygen, because of the synergistic effects of microcracking of silica formed by oxidation and the growth of SiC-nanocrystals at high temperature. The relatively high effective load-bearing area and uniform loading resulting from rapid formation of viscous silica under the wet oxygen environments were considered as reasons for the intermediate deterioration of the tensile strength of the fibres.
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Research context

Nanomaterials

OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced materials and composites

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling Shaanxi, People’s Republic of China

Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, People’s Republic of China

Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an Shaanxi, People’s Republic of China

Funding

State Key Laboratory of Solidification Processing in NWPU · Creative Research Foundation of Science and Technology on Thermostructural Composite Materials Laboratory

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