一种多元铌硅系原位复合材料的高温氧化行为

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2007, Vol. 28 ›› Issue (1): 201-206.

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High temperature oxidation behavior of a multi-elements Nb-Si system in situ composite

SONG Li-guo^1,2,QU Shi-yu²,SONG Jing-xia²,LI Shu-suo¹,GONG Sheng-kai¹,HAN Ya-fang^1,2

1. School of Material Science & Engineering, Beijing University of Aeronautics and Astronautics, 2. Beijing Institute of Aeronautical Materials

Received:2005-09-15 Revised:2005-12-14 Online:2007-01-10 Published:2007-01-10
Contact: HAN Ya-fang^1,2

Abstract

Abstract:

A multi-elements Nb-Si-X system in situ composite with composition of Nb-16Si-24Ti-6Cr-6Al-2Hf (at%) was prepared by arc metlting method. The high temperature oxidation behavior of the alloy was investigated by scanning electron microscopy(SEM), energy dispersive spectrum(EDS) and X-ray diffraction(XRD). The as-cast composite consisted of Nbss phase and β-Nb5Si3 phase; After oxidation test at 1250℃ for 100h, the composite formed a thick scale being mainly composed of CrNbO4 and TiNb2O7, below which severe inner oxidation occurred.

Key words: Nb-Si , system , in , situ , composite, high , temperature , oxidation, oxidation , mechanism, , intermetallic, , inner , oxidation, , Nb5Si3

CLC Number:

TG146.4+16 V257

SONG Li-guo;QU Shi-yu;SONG Jing-xia;LI Shu-suo;GONG Sheng-kai;HAN Ya-fang. High temperature oxidation behavior of a multi-elements Nb-Si system in situ composite [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2007, 28(1): 201-206.

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High temperature oxidation behavior of a multi-elements Nb-Si system in situ composite

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