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�������պ����ѧѧ�� 2009, Vol. 35 Issue (5) :540-543    DOI:
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ϡ��Ԫ�ض�Al-Ni-Gd-Y�Ͻ𾧻���Ϊ��Ӱ��
�κ麣, �λ�ƽ, ����, �� ��*
�������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ, ���� 100191
Effects of rare-earth (RE) elements on crystallization behavior of Al-Ni-Gd-Y amorphous alloy
Song Honghai, Duan Huiping, Ma Chaoli, Zhang Tao,*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ���ò�ʾɨ��������(DSC)��X��������(XRD)��͸��羵(TEM)�о���ϡ��Ԫ��(RE)��Al-Ni-Gd-Y�Ǿ��Ͻ𾧻���Ϊ��Ӱ��.Al-Ni-Gd-Y�Ǿ��Ͻ�ij�ʼ�����¶�����ϡ��Ԫ�غ��������Ӷ�����.��Al(88-��x��)Ni6Gd6Y x ( x =1,2,3,4)ϵ��,����Y����������,��ʼ������������������Al(fcc-Al)���Ϊfcc-Al+Al3Gd/Al3Y+δ֪��.�о����ȴ����ն�Al86Ni8Gd3Y3�Ͻ���ѧ���ܵ�Ӱ��,����,��Al86Ni8Gd3Y3��568�]K�±���10�]minʱ,����΢Ӳ�ȼ����Խϸ�,�����ߴ�Ϊ1~3�]nm��fcc-Al���׾�����.
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Abstract�� The effects of rare-earth (RE) elements on the crystallization behavior of Al-Ni-Gd-Y amorphous alloy were investigated by differential scanning calorimetry(DSC), X-ray diffraction(XRD) and transmission electron microscopy(TEM). The first crystallization temperature of Al-Ni-Gd-Y amorphous alloy increases with RE content. In the alloy Al(88- x )Ni6Gd6Y x ( x =1,2,3,4), the crystallization phase changes from fcc-Al to fcc-Al+Al3Gd/Al3Y+unknown phase when the Y content increasing. The effect of heat-treatment on the mechanical property of Al-Ni-Gd-Y alloy was also investigated. The Al86Ni8Gd3Y3 alloy was of high microhardness and good ductility after heat-treatment at 568�]K for 10�]min and fine precipitation of fcc Al with size of 1~3�]nm was found in the alloy.
Keywords�� rare-earth elements (RE)   amorphous alloy   crystallization   mechanical properties     
Received 2008-08-10;
Fund:

�����ص�����о���չ�ƻ�������Ŀ(2007CB613900); ������Ȼ��ѧ����������Ŀ(50631010,50771006); ����ѧ�ߺʹ����Ŷӷ�չ�ƻ�������Ŀ(IRT0512)

About author: �κ麣(1983-),��,����������,˶ʿ��,couloursea@126.com.
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�κ麣, �λ�ƽ, ����, �� ��.ϡ��Ԫ�ض�Al-Ni-Gd-Y�Ͻ𾧻���Ϊ��Ӱ��[J]  �������պ����ѧѧ��, 2009,V35(5): 540-543
Song Honghai, Duan Huiping, Ma Chaoli, Zhang Tao.Effects of rare-earth (RE) elements on crystallization behavior of Al-Ni-Gd-Y amorphous alloy[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(5): 540-543
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