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�������պ����ѧѧ�� 2004, Vol. 30 Issue (10) :925-929    DOI:
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����, �Ż�, �ƽ�*
�������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ ���� 100083
Formation and mechanical properties of Cu-Zr-Ti bulk glassy alloys
Zhang Tao, Men Hua, Ti Yunjie*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ��Cu-Zr-Ti����Ԫ�Ͻ�ϵ�з����˾��и߷Ǿ��Ͻ��γ������Ī�Cu60Zr40-��x��Ti��x(x��=5%~27.5%,��x��Ϊԭ��������)���Ͻ�,����ͭģ���취�Ʊ��˿���Ǿ��Ͻ�,�����Һ���¶�����Ϊ38~65?K.�ڸúϽ�ϵ�о�����߷Ǿ��γ������ijɷַ�ΧΪCu60Zr40-��x��Ti��x(x��=��7.5%~��12.5%),��Ǿ��γ��ٽ�ֱ��Ϊ5?mm,��Cu-Zr-Ti��Ԫ�Ǿ��Ͻ�������Ϊֹ�Ǿ��γ�������ߵĺϽ�.Cu60Zr40-��x��Ti��x(x��=��7.5%~����12.5%��)����Ǿ��Ͻ������ģ����ѹ������ǿ�ȡ�ѹ������Ӧ���Ӳ�ȷֱ�Ϊ80~114?GPa,1?730~1?865?MPa,0.3%~1.5%��Hv 693~Hv 824,����Ti���������Ӷ����.ͬʱ���и߷Ǿ��γ���������ǿ�ȼ��������Ա���������ͭ������Ǿ��Ͻ�ķ��ֶԷǾ��Ͻ�Ļ����о��͸����ܽṹ���ϵĿ���������Ҫ����.
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Abstract�� Cu-base bulk glassy alloys with high glass-forming ability were fabricated in Cu-Zr-Ti ternary system by copper mold casting. The critical diameter for glass formation was 5?mm for Cu60Zr40-��x��Ti��x��(��x��=7.5%, 10%, 12��5%) alloys, 4?mm for Cu60Zr25Ti15 alloy and 3?mm for Cu60Zr40-��x��Ti��x(x��=15%, 17.5%, 22.5%, 25%) alloys. The glassy alloys exhibited distinct glass transition together with supercooled liquid region in the range of 38~65?K. The Young’s modulus, compressive fracture strength, plastic strain and Vickers hardness of the bulk glassy alloys are in the range of 80~114?GPa, 1?730~1?865?MPa, 0.3%~1.5% and Hv 693~Hv 824, respectively, and increase with increasing Ti content in the alloys. The finding of the Cu-based bulk glassy alloys with high glass-forming ability, high fracture strength and distinct plastic strain indicates a possibility for subsequent development of glassy alloys with new compositions which can be used for structural materials.
Keywords�� copper-base alloys   mechanical properties   bulk glassy alloys   glass-forming ability   supercooled liquid     
Received 2004-04-28;


About author: �� �� (1964-),��,����������,����, zhangtao@buaa.edu.cn.
����, �Ż�, �ƽ�.Cu-Zr-Ti����Ǿ��Ͻ���γɼ�����ѧ����[J]  �������պ����ѧѧ��, 2004,V30(10): 925-929
Zhang Tao, Men Hua, Ti Yunjie.Formation and mechanical properties of Cu-Zr-Ti bulk glassy alloys[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(10): 925-929
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