Interfacial microstructure and mechanical properties of C/C composites and Nb joints brazed with Cu75Pt25 filler metal

Y. Luo; H. Bian; H. W. Niu; Y. Y. Song; Z. B. Chen; X. G. Song; M. R. Wang

doi:10.1016/j.vacuum.2018.08.036

Interfacial microstructure and mechanical properties of C/C composites and Nb joints brazed with Cu75Pt25 filler metal

Y. Luo
, H. Bian
, H. W. Niu
, Y. Y. Song
, Z. B. Chen
, X. G. Song^*
, M. R. Wang

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology Weihai

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

C/C composites were successfully brazed to Nb substrate using Cu75Pt25 filler metal. The typical interfacial microstructure of brazed joints was C/C composites/NbC/Nb(s, s)/Cu(s, s)/NbPt₂/Nb₃Pt/Nb(s, s)/Nb. The effect of brazing temperature on the interfacial microstructure and joints properties were investigated in details. With the increase of temperature, the Nb-Pt reaction layer thickened and the thickness of brazing seam declined. The thickness of Nb(s, s) layer at C/C composites side increased gradually with the increase of temperature and then declined when brazing temperature was over 1160 °C. The optimal average shear strength of 26.7 MPa at room temperature and highest shear strength of 17.6 MPa at 600 °C were obtained when the joints were brazed at 1160 °C for 20 min.

Original language	English
Pages (from-to)	202-209
Number of pages	8
Journal	Vacuum
Volume	157
DOIs	https://doi.org/10.1016/j.vacuum.2018.08.036
State	Published - Nov 2018

Keywords

Brazing
C/C composites
Cu75Pt25 filler metal
Nb
Shear strength

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@article{bd2e90785bd349458855305a492f1528,

title = "Interfacial microstructure and mechanical properties of C/C composites and Nb joints brazed with Cu75Pt25 filler metal",

abstract = "C/C composites were successfully brazed to Nb substrate using Cu75Pt25 filler metal. The typical interfacial microstructure of brazed joints was C/C composites/NbC/Nb(s, s)/Cu(s, s)/NbPt2/Nb3Pt/Nb(s, s)/Nb. The effect of brazing temperature on the interfacial microstructure and joints properties were investigated in details. With the increase of temperature, the Nb-Pt reaction layer thickened and the thickness of brazing seam declined. The thickness of Nb(s, s) layer at C/C composites side increased gradually with the increase of temperature and then declined when brazing temperature was over 1160 °C. The optimal average shear strength of 26.7 MPa at room temperature and highest shear strength of 17.6 MPa at 600 °C were obtained when the joints were brazed at 1160 °C for 20 min.",

keywords = "Brazing, C/C composites, Cu75Pt25 filler metal, Nb, Shear strength",

author = "Y. Luo and H. Bian and Niu, \{H. W.\} and Song, \{Y. Y.\} and Chen, \{Z. B.\} and Song, \{X. G.\} and Wang, \{M. R.\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = nov,

doi = "10.1016/j.vacuum.2018.08.036",

language = "英语",

volume = "157",

pages = "202--209",

journal = "Vacuum",

issn = "0042-207X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Interfacial microstructure and mechanical properties of C/C composites and Nb joints brazed with Cu75Pt25 filler metal

AU - Luo, Y.

AU - Bian, H.

AU - Niu, H. W.

AU - Song, Y. Y.

AU - Chen, Z. B.

AU - Song, X. G.

AU - Wang, M. R.

PY - 2018/11

Y1 - 2018/11

N2 - C/C composites were successfully brazed to Nb substrate using Cu75Pt25 filler metal. The typical interfacial microstructure of brazed joints was C/C composites/NbC/Nb(s, s)/Cu(s, s)/NbPt2/Nb3Pt/Nb(s, s)/Nb. The effect of brazing temperature on the interfacial microstructure and joints properties were investigated in details. With the increase of temperature, the Nb-Pt reaction layer thickened and the thickness of brazing seam declined. The thickness of Nb(s, s) layer at C/C composites side increased gradually with the increase of temperature and then declined when brazing temperature was over 1160 °C. The optimal average shear strength of 26.7 MPa at room temperature and highest shear strength of 17.6 MPa at 600 °C were obtained when the joints were brazed at 1160 °C for 20 min.

AB - C/C composites were successfully brazed to Nb substrate using Cu75Pt25 filler metal. The typical interfacial microstructure of brazed joints was C/C composites/NbC/Nb(s, s)/Cu(s, s)/NbPt2/Nb3Pt/Nb(s, s)/Nb. The effect of brazing temperature on the interfacial microstructure and joints properties were investigated in details. With the increase of temperature, the Nb-Pt reaction layer thickened and the thickness of brazing seam declined. The thickness of Nb(s, s) layer at C/C composites side increased gradually with the increase of temperature and then declined when brazing temperature was over 1160 °C. The optimal average shear strength of 26.7 MPa at room temperature and highest shear strength of 17.6 MPa at 600 °C were obtained when the joints were brazed at 1160 °C for 20 min.

KW - Brazing

KW - C/C composites

KW - Cu75Pt25 filler metal

KW - Nb

KW - Shear strength

UR - https://www.scopus.com/pages/publications/85052482979

U2 - 10.1016/j.vacuum.2018.08.036

DO - 10.1016/j.vacuum.2018.08.036

M3 - 文章

AN - SCOPUS:85052482979

SN - 0042-207X

VL - 157

SP - 202

EP - 209

JO - Vacuum

JF - Vacuum

ER -

Interfacial microstructure and mechanical properties of C/C composites and Nb joints brazed with Cu75Pt25 filler metal

Abstract

Keywords

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