Nd对Mg65Cu22Ni3Y10非晶形成能力及热稳定性的影响

陈振华; 司乃潮; 张扣山; 赵伟

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Nd对Mg₆₅Cu₂₂Ni₃Y₁₀非晶形成能力及热稳定性的影响
Effects of Nd on Glass Forming Ability and Thermal Stability of Mg₆₅Cu₂₂Ni₃Y₁₀ Bulk Amorphous Alloy
2007年第4期页码：311-314
纸质出版日期： 2007 ，
DOI：

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[1]陈振华,司乃潮,张扣山,赵伟.Nd对Mg_(65)Cu_(22)Ni_3Y_(10)非晶形成能力及热稳定性的影响[J].特种铸造及有色合金,2007(04):311-314+245.

Chen Zhenhua, Si Naichao, Zhang Koushan, et al. Effects of Nd on Glass Forming Ability and Thermal Stability of Mg₆₅Cu₂₂Ni₃Y₁₀ Bulk Amorphous Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(4):311-314.
[1]陈振华,司乃潮,张扣山,赵伟.Nd对Mg_(65)Cu_(22)Ni_3Y_(10)非晶形成能力及热稳定性的影响[J].特种铸造及有色合金,2007(04):311-314+245. DOI：

Chen Zhenhua, Si Naichao, Zhang Koushan, et al. Effects of Nd on Glass Forming Ability and Thermal Stability of Mg₆₅Cu₂₂Ni₃Y₁₀ Bulk Amorphous Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(4):311-314. DOI：

摘要

利用楔形铜模铸造法成功制备了Mg65Cu22Ni3Y10-xNdx（x=0、2、4、5、6、8）块体非晶合金

采用XRD、DSC研究了Nd对该合金体系热稳定性和非晶形成能力（GFA）的影响。结果表明

当x=2、4时

Nd的添加可有效提高该合金的GFA和热稳定性;当Nd含量为2%（摩尔分数）时

合金具有最高的过冷液相区（ΔTx=61.5K）及最好的热稳定性;当x=5时

尽管过冷液相区（ΔTx=48.5K）最窄

但此时合金具有最强的非晶形成能力（Trg=Tg/Tl=0.568）和临界厚度（δmax=3.8mm）;随着Nd的进一步增加（x>5）

合金的玻璃形成能力降低。

Abstract

Mg65Cu22Ni3Y10-xNdx bulk amorphous alloys with x of 0

8 were successfully prepared by the wedge-shaped copper mold method. Effects of Nd on glass forming ability （GFA） and thermal stability of Mg65Cu22Ni3Y10 bulk amorphous alloy have been investigated by XRD and DSC. The experimental results reveal that 2% or 4% Nd addition （atom） can improve both glass forming ability and thermal stability of the alloy

with 2% Nd addition

the highest undercooled liquid region （61.5K） and thermal stability are observed. With 5% Nd addition

although the narrowest under-cooled liquid region occurs in the alloy

the best GFA such as approximately temperature of 0.568 and critical thickness

such as 3.8 mm

can be observed. However

with the Nd addition more than 5%

the GFA of the alloy is declined.