Influence of Co Content on the Glass-Forming Ability and Thermal Stability of the Ti-Zr-Be-Cu Bulk Amorphous Alloys

Suo Zhongyuan; Song Yanling; Teng Jiazhuang; Yu Donglin

doi:10.15980/j.tzzz.2014.08.024

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Influence of Co Content on the Glass-Forming Ability and Thermal Stability of the Ti-Zr-Be-Cu Bulk Amorphous Alloys
Vol. 34, Issue 8, Pages: 794-797(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.08.024

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[1]索忠源,宋艳玲,滕加庄,于东林.Co对Ti-Zr-Be-Cu块体非晶形成能力及热稳定性的影响[J].特种铸造及有色合金,2014,34(08):794-797.

Suo Zhongyuan, Song Yanling, Teng Jiazhuang, et al. Influence of Co Content on the Glass-Forming Ability and Thermal Stability of the Ti-Zr-Be-Cu Bulk Amorphous Alloys. [J]. Special Casting & Nonferrous Alloys 34(8):794-797(2014)
[1]索忠源,宋艳玲,滕加庄,于东林.Co对Ti-Zr-Be-Cu块体非晶形成能力及热稳定性的影响[J].特种铸造及有色合金,2014,34(08):794-797. DOI： 10.15980/j.tzzz.2014.08.024.

Suo Zhongyuan, Song Yanling, Teng Jiazhuang, et al. Influence of Co Content on the Glass-Forming Ability and Thermal Stability of the Ti-Zr-Be-Cu Bulk Amorphous Alloys. [J]. Special Casting & Nonferrous Alloys 34(8):794-797(2014) DOI： 10.15980/j.tzzz.2014.08.024.

摘要

采用铜型铸造法制备直径为12mm的Ti35Zr30Be27.5-xCu7.5Cox（x=3.5

7.5

11.5）系列块体非晶合金。采用X射线分析（XRD）、差示扫描量热仪（DSC）研究了Co元素含量变化对Ti-Zr基合金的非晶形成能力、结构变化以及热稳定性的影响。结果表明

随着Co元素替代部分Be元素（x=3.5

7.5）

合金的非晶形成能力由5mm显著提高到12mm

进一步增加Co元素含量（x=11.5）时

非晶形成能力迅速降低

其形成能力不足5mm;但随着Co含量的变化

Ti35Zr30Be27.5-x Cu7.5Cox（x=3.5

7.5

11.5）系列块体非晶合金的玻璃转变温度Tg、晶化温度Tx分别从x=0时的636K和718K降低到x=11.5时的612K和647K。讨论了Co元素的添加对Ti35Zr30Be27.5-xCu7.5Cox（x=3.5

7.5

11.5）合金结构变化的影响。

Abstract

The Ti35Zr30Be27.5-xCu7.5Cox（x=3.5%

7.5%

11.5%）bulk amorphous alloys rods with 12 mm in diameters were prepared by copper mold casting method.Effects of Co content on the structure

glass-forming ability and thermal stability were investigated using X-ray diffractometer（XRD）and differential scanning calorimeter（DSC）.The results show that with the substitution of Co for Be

glassforming ability（GFA）is significantly enhanced and amorphous rods with a diameter of up to 12 mm are produced with 3.5%and 7.5% Co.With increasing the Co content from 7.5%to 11.5%

the GFA is sharply declined to less than 5mm.However

the glass transition temperature

and the crystallization temperature

of Ti35Zr30Be27.5-xCu7.5Cox（x=0

3.5%

7.5%

11.5%）alloys are decrease from 636 Kand 718Kto 612 Kand 647K

respectively.Effects of Co addition on the structure of the Ti35Zr30Be27.5-xCu7.5Cox（x=0

3.5%

7.5%

11.5%）alloys were described.