Surface structure and growth mechanism of TiB2 plate in TiAl-B alloys

Hu Zhang; Wen Li Gao; Er Lin Zhang; Song Yan Zeng

Surface structure and growth mechanism of TiB₂ plate in TiAl-B alloys

Hu Zhang^*
, Wen Li Gao
, Er Lin Zhang
, Song Yan Zeng

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

3 Scopus citations

Abstract

Ti-54Al-xB alloys have been produced by an in-situ method. The microstructure and phase constituent of these alloys were investigated by XRD and SEM. The results show that there are needle shape dendrites which are parallel to [0001] on the edge of TiB₂ plate and convex flakes which are perpendicular to [0001] on the surface of TiB₂ plate. These needles or flakes exhibit facets parallel to those of TiB₂ plate. It is shown through analysis that the Al rich layer and the supersaturation inhomogeneity at the solid-liquid interface resulting from non-equilibrium solidification may make the solid-liquid interface unstable and lead TiB₂ plate to form such a surface structure.

Original language	English
Pages (from-to)	45-48
Number of pages	4
Journal	Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
Volume	19
Issue number	2
State	Published - Apr 2002

Keywords

Growth mechanism
Surface structure
TB
TiAl

Cite this

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title = "Surface structure and growth mechanism of TiB2 plate in TiAl-B alloys",

abstract = "Ti-54Al-xB alloys have been produced by an in-situ method. The microstructure and phase constituent of these alloys were investigated by XRD and SEM. The results show that there are needle shape dendrites which are parallel to [0001] on the edge of TiB2 plate and convex flakes which are perpendicular to [0001] on the surface of TiB2 plate. These needles or flakes exhibit facets parallel to those of TiB2 plate. It is shown through analysis that the Al rich layer and the supersaturation inhomogeneity at the solid-liquid interface resulting from non-equilibrium solidification may make the solid-liquid interface unstable and lead TiB2 plate to form such a surface structure.",

keywords = "Growth mechanism, Surface structure, TB, TiAl",

author = "Hu Zhang and Gao, \{Wen Li\} and Zhang, \{Er Lin\} and Zeng, \{Song Yan\}",

year = "2002",

month = apr,

language = "英语",

volume = "19",

pages = "45--48",

journal = "Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica",

issn = "1000-3851",

publisher = "Beijing University of Aeronautics and Astronautics (BUAA)",

number = "2",

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TY - JOUR

T1 - Surface structure and growth mechanism of TiB2 plate in TiAl-B alloys

AU - Zhang, Hu

AU - Gao, Wen Li

AU - Zhang, Er Lin

AU - Zeng, Song Yan

PY - 2002/4

Y1 - 2002/4

N2 - Ti-54Al-xB alloys have been produced by an in-situ method. The microstructure and phase constituent of these alloys were investigated by XRD and SEM. The results show that there are needle shape dendrites which are parallel to [0001] on the edge of TiB2 plate and convex flakes which are perpendicular to [0001] on the surface of TiB2 plate. These needles or flakes exhibit facets parallel to those of TiB2 plate. It is shown through analysis that the Al rich layer and the supersaturation inhomogeneity at the solid-liquid interface resulting from non-equilibrium solidification may make the solid-liquid interface unstable and lead TiB2 plate to form such a surface structure.

AB - Ti-54Al-xB alloys have been produced by an in-situ method. The microstructure and phase constituent of these alloys were investigated by XRD and SEM. The results show that there are needle shape dendrites which are parallel to [0001] on the edge of TiB2 plate and convex flakes which are perpendicular to [0001] on the surface of TiB2 plate. These needles or flakes exhibit facets parallel to those of TiB2 plate. It is shown through analysis that the Al rich layer and the supersaturation inhomogeneity at the solid-liquid interface resulting from non-equilibrium solidification may make the solid-liquid interface unstable and lead TiB2 plate to form such a surface structure.

KW - Growth mechanism

KW - Surface structure

KW - TB

KW - TiAl

UR - https://www.scopus.com/pages/publications/0036553809

M3 - 文章

AN - SCOPUS:0036553809

SN - 1000-3851

VL - 19

SP - 45

EP - 48

JO - Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica

JF - Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica

IS - 2

ER -

Surface structure and growth mechanism of TiB₂ plate in TiAl-B alloys

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Keywords

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