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�������պ����ѧѧ�� 2005, Vol. 31 Issue (08) :908-912    DOI:
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���, �ܴ���, ������, ��ݱ�*
�������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ, ���� 100083
Effects of spraying powder composition and particle size on microstructures of Al-Cu-Fe quasicrystalline coatings
Cai Fei, Zhou Chungen, Gong Shengkai, Xu Huibin*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ׼�����Ͼ��е��ȵ��ʡ���ĥ��ϵ�������õ���ĥ�ԺͿ������ԡ���Ӳ�ȡ��������Ե���������,ʹ֮������Ϊ�������Ϳ��.Ϊ������ѺϽ�Ŀ������������ܺ���ĥ����, ���õ�ѹ��������Ϳ����LPPS (Low Pressure Plasma Spraying)���ѺϽ�����Ʊ���Al-Cu-Fe׼��Ϳ��.ͨ���ı���Ϳ��ĩ�ijɷֺ����ȴ�С,�о�����Ϳ��ĩ���Ʊ�̬Ϳ����ṹ��΢����ò��Ӱ��. ��X-��������XRD(X-Ray Diffraction)��ɨ��羵SEM(Scanning Electronic Microscope)�����ó�:����ԭ�ӱ�ΪAl70Cu20Fe10������Ϊ-325Ŀ�ķ�ĩ�Ʊ���Ϳ��,��800��������˻���2?h��,�ṹ��������,��ʮ����׼����(I��)������,��ֻ����������β��.
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Abstract�� Quasicrystals have been widely applied for surface protection coating because of their distinguished properties including low thermal conductivity and coefficient of friction, remarkable oxidation and wear resistances, and high hardness etc. To improve the high temperature oxidation and wear resistance of titanium alloy, the Al-Cu-Fe quasicrystalline coatings were produced on titanium alloy substrates using LPPS (low pressure plasma spraying) method. The effect of the spraying powders on the phase structure and microstructure of as-sprayed coatings was studied by altering the composition and the size of spraying powders. The results of XRD (X-ray diffraction), SEM(scanning electronic microscope)show that the Al-Cu-Fe quasicrystalline coating is dense and uniform, by preparing from Al70Cu20Fe10 powders with particle size of –325 mesh(<44.5μm). After annealing under vacuum condition of 800�� for 2 hours, it is observed that the icosahedron phase is the major phase together with a few β- Al (Cu, Fe) phase.
Keywords�� quasicrystals   coatings   microstructure   spraying powder   heat treatment   titanium alloys     
Received 2004-09-08;
About author: �� �(1973-),Ů,�Ϻ���,˶ʿ��, caifei@hkxb.net.cn.
���, �ܴ���, ������, ��ݱ�.��Ϳ��ĩ��Al-Cu-Fe׼��Ϳ����֯�ṹ��Ӱ��[J]  �������պ����ѧѧ��, 2005,V31(08): 908-912
Cai Fei, Zhou Chungen, Gong Shengkai, Xu Huibin.Effects of spraying powder composition and particle size on microstructures of Al-Cu-Fe quasicrystalline coatings[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(08): 908-912
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