Microstructure and interfaces in TiB2/Ti-46Al-3Cr alloy composites

Weimin Si; Michael Dudley; Pengxing Li; Renjie Wu

Microstructure and interfaces in TiB₂/Ti-46Al-3Cr alloy composites

Weimin Si
, Michael Dudley
, Pengxing Li
, Renjie Wu

Materials Science and Engineering

Stony Brook University

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

A ternary titanium aluminide alloy, Ti-46Al-3Cr (at%), was discontinuously reinforced with 5 vol% titanium diboride (TiB₂), by an in-situ synthesis technique, resulting in a two phase γ(TiAl) (mainly) and α₂(Ti₃Al) matrix with randomly dispersed TiB₂ particle. Interfaces of TiB₂-TiAl were investigated by Analytical Electron Microscopy (AEM) and High Resolution Electron Microscopy (HREM). No consistent crystallographic orientation relationship was observed between TiB₂ particle and TiAl matrix, and there was no evidence of alloying elements (such as Cr) segregation or interphase formation at the TiB₂-TiAl interface. HREM results indicated that no semi-coherent interface between TiB₂ and TiAl has been observed. There existed a thin amorphous layer (0.5 to 1.3 nm) at the TiB₂-TiAl interface, which may accommodate the large lattice misfit across the interface and enhance the interfacial bonding.

Original language	English
Pages (from-to)	405-410
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	410
State	Published - 1996
Event	Proceedings of the 1995 Fall MRS Symposium - Boston, MA, USA Duration: Nov 27 1995 → Nov 30 1995

Cite this

@article{92dc0635965a45f2acdb0d9816cd2a61,

title = "Microstructure and interfaces in TiB2/Ti-46Al-3Cr alloy composites",

abstract = "A ternary titanium aluminide alloy, Ti-46Al-3Cr (at\%), was discontinuously reinforced with 5 vol\% titanium diboride (TiB2), by an in-situ synthesis technique, resulting in a two phase γ(TiAl) (mainly) and α2(Ti3Al) matrix with randomly dispersed TiB2 particle. Interfaces of TiB2-TiAl were investigated by Analytical Electron Microscopy (AEM) and High Resolution Electron Microscopy (HREM). No consistent crystallographic orientation relationship was observed between TiB2 particle and TiAl matrix, and there was no evidence of alloying elements (such as Cr) segregation or interphase formation at the TiB2-TiAl interface. HREM results indicated that no semi-coherent interface between TiB2 and TiAl has been observed. There existed a thin amorphous layer (0.5 to 1.3 nm) at the TiB2-TiAl interface, which may accommodate the large lattice misfit across the interface and enhance the interfacial bonding.",

author = "Weimin Si and Michael Dudley and Pengxing Li and Renjie Wu",

year = "1996",

language = "English",

volume = "410",

pages = "405--410",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

note = "Proceedings of the 1995 Fall MRS Symposium ; Conference date: 27-11-1995 Through 30-11-1995",

}

TY - JOUR

T1 - Microstructure and interfaces in TiB2/Ti-46Al-3Cr alloy composites

AU - Si, Weimin

AU - Dudley, Michael

AU - Li, Pengxing

AU - Wu, Renjie

PY - 1996

Y1 - 1996

N2 - A ternary titanium aluminide alloy, Ti-46Al-3Cr (at%), was discontinuously reinforced with 5 vol% titanium diboride (TiB2), by an in-situ synthesis technique, resulting in a two phase γ(TiAl) (mainly) and α2(Ti3Al) matrix with randomly dispersed TiB2 particle. Interfaces of TiB2-TiAl were investigated by Analytical Electron Microscopy (AEM) and High Resolution Electron Microscopy (HREM). No consistent crystallographic orientation relationship was observed between TiB2 particle and TiAl matrix, and there was no evidence of alloying elements (such as Cr) segregation or interphase formation at the TiB2-TiAl interface. HREM results indicated that no semi-coherent interface between TiB2 and TiAl has been observed. There existed a thin amorphous layer (0.5 to 1.3 nm) at the TiB2-TiAl interface, which may accommodate the large lattice misfit across the interface and enhance the interfacial bonding.

AB - A ternary titanium aluminide alloy, Ti-46Al-3Cr (at%), was discontinuously reinforced with 5 vol% titanium diboride (TiB2), by an in-situ synthesis technique, resulting in a two phase γ(TiAl) (mainly) and α2(Ti3Al) matrix with randomly dispersed TiB2 particle. Interfaces of TiB2-TiAl were investigated by Analytical Electron Microscopy (AEM) and High Resolution Electron Microscopy (HREM). No consistent crystallographic orientation relationship was observed between TiB2 particle and TiAl matrix, and there was no evidence of alloying elements (such as Cr) segregation or interphase formation at the TiB2-TiAl interface. HREM results indicated that no semi-coherent interface between TiB2 and TiAl has been observed. There existed a thin amorphous layer (0.5 to 1.3 nm) at the TiB2-TiAl interface, which may accommodate the large lattice misfit across the interface and enhance the interfacial bonding.

UR - https://www.scopus.com/pages/publications/0029697241

M3 - Conference article

AN - SCOPUS:0029697241

SN - 0272-9172

VL - 410

SP - 405

EP - 410

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1995 Fall MRS Symposium

Y2 - 27 November 1995 through 30 November 1995

ER -

Microstructure and interfaces in TiB₂/Ti-46Al-3Cr alloy composites

Abstract

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