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�������պ����ѧѧ�� 2008, Vol. 34 Issue (8) :916-919    DOI:
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���Ⱥϳ�FeNiCr/NiAl-TiCͿ���ʱЧ�о�
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�������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ, ���� 100191
Aging treatment of FeNiCr/NiAl-TiC composite coatings produced by thermit process
Wang Genlong, Xi Wenjun*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �����ȷ�Ӧ�ϳɹ����ڸֹ��ڱ����Ʊ�����FeNiCr/NiAl-TiC����Ϳ��.��ɨ�������΢��(SEM)��X����������(XRD)��������(EDS)��͸�������΢��(TEM)�ȷ����ֶ��о���Ϳ����΢�ṹ�Լ�����ʱЧ��FeNiCr/NiAl-TiCͿ����΢�ṹ��Ӱ��.�о�����,FeNiCr/NiAl-TiC����Ϳ����TiC,NiAl,��α��-FeNiCr�������,����ϸС,�Ͻ�����ɪ�α��-FeNiCr��NiAl�������,����NiAl��ߴ�ԼΪ100��nm.��������ʱЧ,������ɲ���,TiC��̬�ͳߴ��ȶ�,��α��-FeNiCr������NiAl��ijߴ�ԼΪ400��nm,ʱЧ��NiAl�ͪ�α��-FeNiCr�Ա��ֹ����ϵ.
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Abstract�� The FeNiCr/NiAl-TiC composite coatings were prepared by thermit reaction process in a carbon steel pipe. Using scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and energy dispersive spectrum (EDS), the microstructure of the composite coatings and effects of aging treatment on the microstructure were investigated. Results show that the FeNiCr/NiAl-TiC composite coatings are composed of titanium carbide (TiC), intermetallic compound NiAl and ferrite (���-FeNiCr). The alloy matrix consists of NiAl and ���-FeNiCr in which the grain size of the NiAl is about 100��nm. After aging treatment, the phase constituent of the coatings doesn-t change. The shape and size of TiC particle are stable. The grain size of NiAl phase is about 400��nm and it is coherent with the ferrite matrix.
Keywords�� coatings   aging   titanium carbide   thermit reaction     
Received 2007-07-30;
Fund:

������Ȼ��ѧ����������Ŀ(50472100)

About author: ������(1983-), ��, ���ջ�����, ˶ʿ��, w-genlong1984@163.com.
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������,ϯ�ľ�.���Ⱥϳ�FeNiCr/NiAl-TiCͿ���ʱЧ�о�[J]  �������պ����ѧѧ��, 2008,V34(8): 916-919
Wang Genlong, Xi Wenjun.Aging treatment of FeNiCr/NiAl-TiC composite coatings produced by thermit process[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(8): 916-919
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