2014•Surface EngineeringRequires access

Double layer ZrSi2–ZrC–SiC/SiC oxidation protective coating for carbon/carbon composites

Manhong Hu, K. Z. Li, H. J. Li, Bo Wang, H. L.

Abstract

A ZrSi2–ZrC–SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.

About this research paper

What this paper is about

Why it matters

OpenAlex reports 29 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Materials science, Thermal shock, Coating, Reinforced carbon–carbon, Composite material, Microstructure, Cementation (geology), Layer (electronics)