Processing, microstructure and mechanical properties of vacuum-brazed Al2O3/Ti6Al4V joints

J. Cao; Z. J. Zheng; L. Z. Wu; J. L. Qi; Z. P. Wang; J. C. Feng

doi:10.1016/j.msea.2011.12.042

Processing, microstructure and mechanical properties of vacuum-brazed Al₂O₃/Ti6Al4V joints

J. Cao^*
, Z. J. Zheng
, L. Z. Wu
, J. L. Qi
, Z. P. Wang
, J. C. Feng

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

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

43 Scopus citations

Abstract

The vacuum brazing of alumina ceramic to Ti6Al4V alloy was performed using Ag-Cu eutectic filler metal. The microstructure at the ceramic-metal interfaces and the mechanical properties of the brazed joint were examined. The microstructure of the joint brazed at 825°C for 10min consisted of α-β Ti, Ti2Cu, TiCu, Ti3Cu4, Ag-based solid solution and Ti₄(Cu,Al)₂O phases starting from Ti6Al4V to alumina substrate. The brazing parameters had a strong influence on the microstructure and shear strength of the joint. The brittle fracture mainly propagated in the alumina substrate. The highest shear strength was obtained when the joint was brazed at 825°C for 10min. When a Cu foil was sandwiched between two Ag-Cu brazing foils, the microstructure of the joint changed greatly and the shear strength increased correspondingly.

Original language	English
Pages (from-to)	62-67
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	535
DOIs	https://doi.org/10.1016/j.msea.2011.12.042
State	Published - 15 Feb 2012

Keywords

Alumina
Brazing
Mechanical properties
Microstructure
Titanium

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10.1016/j.msea.2011.12.042

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title = "Processing, microstructure and mechanical properties of vacuum-brazed Al2O3/Ti6Al4V joints",

abstract = "The vacuum brazing of alumina ceramic to Ti6Al4V alloy was performed using Ag-Cu eutectic filler metal. The microstructure at the ceramic-metal interfaces and the mechanical properties of the brazed joint were examined. The microstructure of the joint brazed at 825°C for 10min consisted of α-β Ti, Ti2Cu, TiCu, Ti3Cu4, Ag-based solid solution and Ti4(Cu,Al)2O phases starting from Ti6Al4V to alumina substrate. The brazing parameters had a strong influence on the microstructure and shear strength of the joint. The brittle fracture mainly propagated in the alumina substrate. The highest shear strength was obtained when the joint was brazed at 825°C for 10min. When a Cu foil was sandwiched between two Ag-Cu brazing foils, the microstructure of the joint changed greatly and the shear strength increased correspondingly.",

keywords = "Alumina, Brazing, Mechanical properties, Microstructure, Titanium",

author = "J. Cao and Zheng, \{Z. J.\} and Wu, \{L. Z.\} and Qi, \{J. L.\} and Wang, \{Z. P.\} and Feng, \{J. C.\}",

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doi = "10.1016/j.msea.2011.12.042",

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T1 - Processing, microstructure and mechanical properties of vacuum-brazed Al2O3/Ti6Al4V joints

AU - Cao, J.

AU - Zheng, Z. J.

AU - Wu, L. Z.

AU - Qi, J. L.

AU - Wang, Z. P.

AU - Feng, J. C.

PY - 2012/2/15

Y1 - 2012/2/15

N2 - The vacuum brazing of alumina ceramic to Ti6Al4V alloy was performed using Ag-Cu eutectic filler metal. The microstructure at the ceramic-metal interfaces and the mechanical properties of the brazed joint were examined. The microstructure of the joint brazed at 825°C for 10min consisted of α-β Ti, Ti2Cu, TiCu, Ti3Cu4, Ag-based solid solution and Ti4(Cu,Al)2O phases starting from Ti6Al4V to alumina substrate. The brazing parameters had a strong influence on the microstructure and shear strength of the joint. The brittle fracture mainly propagated in the alumina substrate. The highest shear strength was obtained when the joint was brazed at 825°C for 10min. When a Cu foil was sandwiched between two Ag-Cu brazing foils, the microstructure of the joint changed greatly and the shear strength increased correspondingly.

AB - The vacuum brazing of alumina ceramic to Ti6Al4V alloy was performed using Ag-Cu eutectic filler metal. The microstructure at the ceramic-metal interfaces and the mechanical properties of the brazed joint were examined. The microstructure of the joint brazed at 825°C for 10min consisted of α-β Ti, Ti2Cu, TiCu, Ti3Cu4, Ag-based solid solution and Ti4(Cu,Al)2O phases starting from Ti6Al4V to alumina substrate. The brazing parameters had a strong influence on the microstructure and shear strength of the joint. The brittle fracture mainly propagated in the alumina substrate. The highest shear strength was obtained when the joint was brazed at 825°C for 10min. When a Cu foil was sandwiched between two Ag-Cu brazing foils, the microstructure of the joint changed greatly and the shear strength increased correspondingly.

KW - Alumina

KW - Brazing

KW - Mechanical properties

KW - Microstructure

KW - Titanium

UR - https://www.scopus.com/pages/publications/84862829837

U2 - 10.1016/j.msea.2011.12.042

DO - 10.1016/j.msea.2011.12.042

M3 - 文章

AN - SCOPUS:84862829837

SN - 0921-5093

VL - 535

SP - 62

EP - 67

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Processing, microstructure and mechanical properties of vacuum-brazed Al₂O₃/Ti6Al4V joints

Abstract

Keywords

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