Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第21卷    第5期    总第146期    2011年5月

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文章编号:1004-0609(2011)05-1066-08
Ag和Fe元素添加对Cu-Zr-Al系非晶形成能力和
力学性能的影响
赵燕春1, 寇生中1, 2, 刘广桥1, 丁雨田1, 李春燕1, 袁子洲1, 索红莉2

(1. 兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室,兰州 730050;
2. 北京工业大学 新型功能材料教育部重点实验室,北京 100022
)

摘 要: 以Cu-Zr-Al三元系为基础,研究Ag和Fe合金组元添加对块体金属玻璃(BMG)及BMG基复合材料的非晶形成能力和力学性能的影响。在Cu-Zr-Al三元合金体系中,Cu50Zr42Al8系BMG的∆Tx =61 K,Trg = 0.624,γ = 0.416。适量添加Ag元素能显著地提高非晶形成能力;在Cu-Zr-Al-Ag四元合金体系中,Cu43Zr45Al8Ag4、Cu45Zr42Al8Ag5、Cu40Zr44Al10Ag6、Cu43Zr41Al8Ag8和Cu36Zr48Al8Ag8的Trg分别为0.618、0., 625、0.618、0.628和0.598,γ值分别为 0.424、0.427、0.424、0.432和0.433,ΔTx分别为77、76、78、84和108 K。在(Cu0.36Zr0.48- Al0.08Ag0.08)100−xFex(x=0, 3, 5, 10, 15, 20)五元体系中,Fe的添加明显影响合金的非晶形成能力;尽管ΔTx和Trg呈下降趋势,但(Cu0.36Zr0.48Al0.08Ag0.08)97Fe3块体非晶合金仍具有较高的非晶形成能力,其ΔTx=103 K,Trg=0.566,γ= 0.424;Fe的适量加入可显著提高合金的力学性能,其中(Cu0.36Zr0.48Al0.08Ag0.08)95Fe5合金的强度和塑性应变分别提高至2 249 MPa和4.9%。Fe元素的存在导致Cu36Zr48Al8Ag8合金中产生明显的相分离,使(Cu0.36Zr0.48Al0.08- Ag0.08)100−xFex合金得到增强增韧。

 

关键字: 块体金属玻璃;非晶形成能力;合金化;力学性能

Effects of Ag and Fe elements on glass-forming ability and
mechanical properties of Cu-Zr-Al bulk amorphous system
ZHAO Yan-chun1, KOU Sheng-zhong1, 2, LIU Guang-qiao1,
DING Yu-tian1, LI Chun-yan1, YUAN Zi-zhou1, SUO Hong-li2

1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,
Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Advanced Functional Materials,
Ministry of Education, Beijing University of Technology, Beijing 100022, China

Abstract:Based on Cu-Zr-Al tenary alloy, the effects of addition of Ag and Fe elements on glass-forming ability and mechanical properties of Cu-Zr-Al-Ag and Cu-Zr-Al-Ag-Fe bulk amorphous systems were investigated. Cu50Zr42Al8 BMG exhibits high glass-forming ability and thermal stability in ternary alloy system, ΔTx, Trg and γ of which are 61 K, 0.624 and 0.416, respectively. The glass-forming ability of Cu-Zr-Al ternary alloy system is obviously improved with addition of Ag. In the quaternary system, Trg of Cu43Zr45Al8Ag4, Cu45Zr42Al8Ag5, Cu40Zr44Al10Ag6, Cu43Zr41Al8Ag8 and Cu36Zr48Al8Ag8 are 0.618, 0.625, 0.618, 0.628 and 0.598, γ of which are 0.424, 0.427, 0.424, 0.432 and 0.433,ΔTx of which are 77, 76, 78, 84 and 108 K, respectively. In the (Cu0.36Zr0.48Al0.08Ag0.08)100−xFex(x=0,3,5,10,15,20) quinary system, the addition of Fe exists an obvious effect on the glass forming ability of the alloys. Although the ΔTx and Trg are reduced, the (Cu0.36Zr0.48 Al0.08Ag0.08)97Fe3 bulk amorphous alloy exhibits high glass-forming ability, and ΔTx, Trg and γ of this alloy are 103 K, 0.566 and 0.424, respectively. The compressive fracture strength and plastic strain of (Cu0.36Zr0.48- Al0.08Ag0.08)95Fe5 alloy increase to 2 249 MPa and 4.9%, respectively, which shows that the addition of suitable Fe improves the mechanical properties obviously. The existence of Fe element results in the distinct phase separation in Cu36Zr48Al8Ag8 alloys, which strengthens and toughens the (Cu0.36Zr0.48Al0.08Ag0.08)100−xFex alloy.

 

Key words: bulk metallic glass; glass-forming ability; alloying; mechanical property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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