Premium
Ablation Behavior of Zr–Al(Si)–C Layered Carbides Modified 3D Needled C/SiC Composites
Author(s) -
Ma Yuzhao,
Yin Xiaowei,
Fan Xiaomeng,
Dang Xiaolin,
Ju Panfei,
Cheng Laifei,
Zhang Litong
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800936
Subject(s) - materials science , carbide , composite material , melting point , alloy , silicon carbide , chemical vapor infiltration , slurry , flexural strength , ablation , composite number , engineering , aerospace engineering
3DN C/SiC composites modified through the combined method of slurry impregnation (SI) with reactive melt infiltration (RMI) can obtain obviously improved mechanical properties. However, when used under the oxyacetylene torch ablation environment, metal melt and low melting point oxides usually lead to the low ablative properties. In this paper, Al 40 Si 60 alloy and Si melt are used to infiltrate 3DN C/SiC preforms impregnated with TiC or ZrC powders, respectively. Large amount of Ti 3 Si(Al)C 2 or Zr 3 Al 3 C 5 (and Zr 3 [Al(Si)] 4 C 6 ) with nano‐laminated structure generated in the modification matrix, which not only increase the flexural strength of the composites, but also reduce the content of low melting point phases in the modification matrix. These layered carbides can keep steady under air flow, thus further improve material's ablative properties. Meanwhile, during the ablation of Zr–Al(Si)–C layered carbides modify 3D needled C/SiC, the high melting point layered carbides act synergistically with the high melting point ZrO 2 generated. They can block the ZrO 2 generated from migrating along with the air flow, so that ZrO 2 can effectively act its pinning effect on the oxide melt and finally obtain desirable ablative properties.