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�������պ����ѧѧ�� 2007, Vol. 33 Issue (07) :865-868    DOI:
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Low oxygen partial pressure self-fusing Al-Si coating formed on surface of Ti alloy and its oxidation resistance
Zhou Wei, Zhao Yuguang*
Key Laboratory of Automobile Materials,Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130025, China

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ժҪ ���õ���ѹ���¿����۽Ἴ����Ti-6Al-4V�Ͻ����ɹ����Ʊ���������������Al-Si�۽�Ϳ��.��Si������Ϳ�����,���ֹ�����Լ�,����Ҫ������ʱ�����ɢ�����γ��㹻��ȵ�Al-Si�۽�Ϳ��,ʡʱ����,��Ϳ���п�����Ԫ���������Ũ�ȿ�ͨ��������ĩ�Ļ�ϱ��������п���.X���߼�����Ϳ����Ҫ��Ti5Si3��TiAl3���.��923��K������52��hѭ����������������:����ѹ�۽�Al-SiͿ����ǰ10��h�������������������ؽϿ�,�������������������������ؽ�Ϊ����,��Si������Ϳ��������������һֱ�����Žϸߵ���������.
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�ؼ����� Ti-6Al-4V�Ͻ�   ����ѹ�۽�Al-SiͿ��   Si������Ϳ��   ��������     
Abstract�� An Al-Si fusing coating was successfully produced by means of the low oxygen partial pressure high-temperature fusing technique for the improvement of the high-temperature oxidation resistance of Ti-6Al-4V alloy. Unlike the Si-modified aluminide coating, this technique is much effective and cheap without the need for long time diffusion for the formation of the Al-Si fusing coating, and the concentrations of the oxidation-resistant elements, Al and Si, in the coating can be controlled by adjusting powder mixing ratio. X-ray diffraction(XRD) shows that the Al-Si fusing coating is mainly composed of Ti5Si3 and TiAl3 phases. Cyclic oxidation tests at 923��K for 52h in air reveals that the mass gains of the low oxygen partial pressure self-fusing Al-Si coating (LOPPF) is rapid in the initial 10��h oxidation and keeps slow in the following oxidation; However, for the Si-modified aluminide coating, it keeps a rapid oxidation rate throughout the oxidation time.
Keywords�� Ti-6Al-4V alloy   low oxygen partial pressure self-fusing coating   Si-modified aluminide coating   high-temperature oxidation     
Received 2006-06-28;
Fund:

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About author: �� ΰ(1978-),��,����������,��ʿ��,zhouwei4312002@126.com.
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��ΰ, �����.�ѺϽ�������ѹ�۽�Al-SiͿ�㼰����������[J]  �������պ����ѧѧ��, 2007,V33(07): 865-868
Zhou Wei, Zhao Yuguang.Low oxygen partial pressure self-fusing Al-Si coating formed on surface of Ti alloy and its oxidation resistance[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(07): 865-868
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