|Table of Contents|

Study on erosion wear properties and its mechanism of C/SiC composite nozzle(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年01期
Page:
53-58
Research Field:
研究与设计
Publishing date:

Info

Title:
Study on erosion wear properties and its mechanism of C/SiC composite nozzle
Author(s):
YANG Xiaohui; CAO Pei; WANG Yi; BAI Longteng
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
C/SiC composites;  nozzle;  erosion wear;  microstructure;  erosion mechanism
PACS:
V250.1
DOI:
-
Abstract:
For validating application feasibility of C/SiC composite nozzle in the liquid-solid two phase flow in the actual environment, the C/SiC composite nozzle was fabricated by the chemical vapor deposition process and preceramic polymer impregnation pyrolysis process, combined with engineering application background of C/SiC composites nozzle. Long life assessment was also carried out in actual enviroment. Based on erosion wear characteristics of the C/SiC composites nozzles during the assessment process, SEM analysis was made used for the liquid-solid two-phase flow characteristic, microstructure evolution and the erosion wear mechanisms with different location of the nozzle. The results show that the C/SiC composite nozzle exhibits an increasing degree of erosion wear from the inlet end to the outlet section of the test piece. The erosion wear mode is mainly composed of erosion pit and thermal stress “crash”, and the main cause of the “biasing” phenomenon is the anisotropy of the C/SiC composite and the non-uniformity of the liquid-two-phase flow.

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Memo

Memo:
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Last Update: 2019-02-20