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A novel Zr-Ti-Ni-Cu eutectic system with low melting temperature for the brazing of titanium alloys near 800 °C

Published online by Cambridge University Press:  31 January 2011

Ju-Hyun Sun ,
Dong-Myoung Lee ,
Chi-Hwan Lee ,
Joo-Wha Hong  and
Seung-Yong Shin
Ju-Hyun Sun
Affiliation:
Eco Materials & Processing Department, Korea Institute of Industrial Technology 7-47, Songdo-Dong, Yeonsu-Gu, Incheon, 406-840, Korea; and Department of Advanced Materials Engineering, Chungbuk National University 410, Sungbong-Ro, Heungduk-Gu, Cheongju 361-763, Korea
Dong-Myoung Lee
Affiliation:
Eco Materials & Processing Department, Korea Institute of Industrial Technology 7-47, Songdo-Dong, Yeonsu-Gu, Incheon, 406-840, Korea; and Department of Metallurgical Engineering, Inha University 253, Yonghyun-dong, Nam-gu, Incheon, 402-751, Korea
Chi-Hwan Lee
Affiliation:
Department of Metallurgical Engineering, Inha University 253, Yonghyun-dong, Nam-gu, Incheon, 402-751, Korea
Joo-Wha Hong
Affiliation:
Department of Advanced Materials Engineering, Chungbuk National University 410, Sungbong-Ro, Heungduk-Gu, Cheongju 361-763, Korea
Seung-Yong Shin*
Affiliation:
Eco Materials & Processing Department, Korea Institute of Industrial Technology 7-47, Songdo-Dong, Yeonsu-Gu, Incheon, 406-840, Korea
*
a)Address all correspondence to this author. e-mail: seung@kitech.re.kr
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Abstract

This article reports on low (below 800 °C) melting temperature characteristics of a Zr-Ti-Ni-Cu alloy system, designed by adding a small amount of Cu to a Zr-Ti-Ni eutectic alloy system in the Zr-rich corner of the Zr-Ti-Ni system. A series of Zr-Ti-Ni-Cu-based alloy buttons of varying Cu content was fabricated by an arc melting machine. The melting temperature ranges of the quaternary alloys were systematically examined by differential thermal analysis (DTA). As a result, a quaternary eutectic alloy of composition Zr54Ti22Ni16Cu8 with a low melting temperature range from 774 °C to 783 °C was found. In addition, structural and chemical analysis results for the slowly solidified, quaternary eutectic alloy sample revealed equivalent quaternary eutectic structure and phases to those of the ternary eutectic Zr50Ti26Ni24 alloy, except for a small amount of Cu dissolved in individual constituent phases. The wetting angle tested at 800 °C for 60 s on the commercially pure titanium was about 25°.

Keywords

BrazingTiPhase equilibria
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 2 , February 2010 , pp. 296 - 302
Copyright
Copyright © Materials Research Society 2010

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References

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