Microstructure evolution and mechanical properties of titanium/alumina brazed joints for medical implants

Hong Bian; Xiaoguo Song; Shengpeng Hu; Yuzhen Lei; Yide Jiao; Shutong Duan; Jicai Feng; Weimin Long

doi:10.3390/met9060644

Microstructure evolution and mechanical properties of titanium/alumina brazed joints for medical implants

Hong Bian
, Xiaoguo Song^*
, Shengpeng Hu
, Yuzhen Lei
, Yide Jiao
, Shutong Duan
, Jicai Feng
, Weimin Long

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Harbin Institute of Technology Weihai
Harbin Institute of Technology
Zhengzhou Research Institute of Mechanical Engineering

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

51 Scopus citations

Abstract

Medical titanium and alumina (Al₂O₃) bioceramic are widely utilized as biomaterials. A reliable brazed joint of titanium and alumina was successfully obtained using biocompatible Au foil for implantable devices in the present study. The interfacial microstructure and reaction products of titanium/Au/Al₂O₃ joints brazed under different conditions were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). In this study, the typical interfacial microstructure of the titanium/Au/Al₂O₃ joint was titanium/Ti₃Au layer/TiAu layer/TiAu₂ layer/TiAu4 layer/Au + granular TiAu4 layer/TiOx phase/Al₂O₃ ceramic. With increasing brazing temperature or holding time, the thicknesses of Ti3Au + TiAu + TiAu₂ layers adjacent to the titanium substrate increased gradually. Shear tests indicated that the joint brazed at 1115 °C for 3 min exhibited the highest shear strength of 39.2 MPa. Typical fracture analysis displayed that the crack started at the Al₂O₃ ceramic and propagated along the interface of TiAu₂ and TiAu₄ reaction layers.

Original language	English
Article number	644
Journal	Metals
Volume	9
Issue number	6
DOIs	https://doi.org/10.3390/met9060644
State	Published - Jun 2019

Keywords

Alumina
Brazing
Interfacial microstructure
Mechanical properties
Titanium

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10.3390/met9060644

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@article{eec5efd24cda490383b4a5c4f55677ee,

title = "Microstructure evolution and mechanical properties of titanium/alumina brazed joints for medical implants",

abstract = "Medical titanium and alumina (Al2O3) bioceramic are widely utilized as biomaterials. A reliable brazed joint of titanium and alumina was successfully obtained using biocompatible Au foil for implantable devices in the present study. The interfacial microstructure and reaction products of titanium/Au/Al2O3 joints brazed under different conditions were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). In this study, the typical interfacial microstructure of the titanium/Au/Al2O3 joint was titanium/Ti3Au layer/TiAu layer/TiAu2 layer/TiAu4 layer/Au + granular TiAu4 layer/TiOx phase/Al2O3 ceramic. With increasing brazing temperature or holding time, the thicknesses of Ti3Au + TiAu + TiAu2 layers adjacent to the titanium substrate increased gradually. Shear tests indicated that the joint brazed at 1115 °C for 3 min exhibited the highest shear strength of 39.2 MPa. Typical fracture analysis displayed that the crack started at the Al2O3 ceramic and propagated along the interface of TiAu2 and TiAu4 reaction layers.",

keywords = "Alumina, Brazing, Interfacial microstructure, Mechanical properties, Titanium",

author = "Hong Bian and Xiaoguo Song and Shengpeng Hu and Yuzhen Lei and Yide Jiao and Shutong Duan and Jicai Feng and Weimin Long",

note = "Publisher Copyright: {\textcopyright} 2019 by the authors.",

year = "2019",

month = jun,

doi = "10.3390/met9060644",

language = "英语",

volume = "9",

journal = "Metals",

issn = "2075-4701",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "6",

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TY - JOUR

T1 - Microstructure evolution and mechanical properties of titanium/alumina brazed joints for medical implants

AU - Bian, Hong

AU - Song, Xiaoguo

AU - Hu, Shengpeng

AU - Lei, Yuzhen

AU - Jiao, Yide

AU - Duan, Shutong

AU - Feng, Jicai

AU - Long, Weimin

PY - 2019/6

Y1 - 2019/6

N2 - Medical titanium and alumina (Al2O3) bioceramic are widely utilized as biomaterials. A reliable brazed joint of titanium and alumina was successfully obtained using biocompatible Au foil for implantable devices in the present study. The interfacial microstructure and reaction products of titanium/Au/Al2O3 joints brazed under different conditions were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). In this study, the typical interfacial microstructure of the titanium/Au/Al2O3 joint was titanium/Ti3Au layer/TiAu layer/TiAu2 layer/TiAu4 layer/Au + granular TiAu4 layer/TiOx phase/Al2O3 ceramic. With increasing brazing temperature or holding time, the thicknesses of Ti3Au + TiAu + TiAu2 layers adjacent to the titanium substrate increased gradually. Shear tests indicated that the joint brazed at 1115 °C for 3 min exhibited the highest shear strength of 39.2 MPa. Typical fracture analysis displayed that the crack started at the Al2O3 ceramic and propagated along the interface of TiAu2 and TiAu4 reaction layers.

AB - Medical titanium and alumina (Al2O3) bioceramic are widely utilized as biomaterials. A reliable brazed joint of titanium and alumina was successfully obtained using biocompatible Au foil for implantable devices in the present study. The interfacial microstructure and reaction products of titanium/Au/Al2O3 joints brazed under different conditions were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). In this study, the typical interfacial microstructure of the titanium/Au/Al2O3 joint was titanium/Ti3Au layer/TiAu layer/TiAu2 layer/TiAu4 layer/Au + granular TiAu4 layer/TiOx phase/Al2O3 ceramic. With increasing brazing temperature or holding time, the thicknesses of Ti3Au + TiAu + TiAu2 layers adjacent to the titanium substrate increased gradually. Shear tests indicated that the joint brazed at 1115 °C for 3 min exhibited the highest shear strength of 39.2 MPa. Typical fracture analysis displayed that the crack started at the Al2O3 ceramic and propagated along the interface of TiAu2 and TiAu4 reaction layers.

KW - Alumina

KW - Brazing

KW - Interfacial microstructure

KW - Mechanical properties

KW - Titanium

UR - https://www.scopus.com/pages/publications/85068456507

U2 - 10.3390/met9060644

DO - 10.3390/met9060644

M3 - 文章

AN - SCOPUS:85068456507

SN - 2075-4701

VL - 9

JO - Metals

JF - Metals

IS - 6

M1 - 644

ER -

Microstructure evolution and mechanical properties of titanium/alumina brazed joints for medical implants

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