In situ composite formation in Ti-Al-Si ternary system

K. P. Rao; Y. J. Du; J. C Y Chung; K. C. Lau

doi:10.1016/S0924-0136(99)00012-6

In situ composite formation in Ti-Al-Si ternary system

K. P. Rao
, Y. J. Du
, J. C Y Chung
, K. C. Lau

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

10 Citations (Scopus)

Abstract

Three stoichiometric TiAlSi-based metastable alloys (i.e. Ti-14Al-21Si, Ti-11Al-21Si and Ti-9Al-27Si, at.%) have been synthesized by mechanical alloying (MA). It has been found, by means of X-ray diffraction (XRD) and transmission electron microscope (TEM), that these metastable phases (or precursors) are mainly in nano-structures, with partially amorphous phases as for the alloy Ti-14Al-21Si. Importantly, investigation of these metastable phases during heating (by using differential thermal analysis, DTA) shows a hierarchical change in phase transition, and particularly Ti₅Si3 is in situ formed via a phase transition path TiSi₂ → TiSi → Ti₅Si₄ → Ti₅Si₃. This is meaningful in materials design using a kinetics bias strategy. Microstructures of fully densified Ti₅Si₃/TiAl in situ composites have been observed by optical microscope.

Original language	English
Pages (from-to)	361-366
Journal	Journal of Materials Processing Technology
Volume	89-90
DOIs	https://doi.org/10.1016/S0924-0136(99)00012-6
Publication status	Published - 19 May 1999
Event	4th Asia Pacific Conference on Materials Processing (APCMP 1999) - , Singapore Duration: 19 May 1999 → 20 May 1999

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@article{3a880010a8744e139670302eff0d4c74,

title = "In situ composite formation in Ti-Al-Si ternary system",

abstract = "Three stoichiometric TiAlSi-based metastable alloys (i.e. Ti-14Al-21Si, Ti-11Al-21Si and Ti-9Al-27Si, at.\%) have been synthesized by mechanical alloying (MA). It has been found, by means of X-ray diffraction (XRD) and transmission electron microscope (TEM), that these metastable phases (or precursors) are mainly in nano-structures, with partially amorphous phases as for the alloy Ti-14Al-21Si. Importantly, investigation of these metastable phases during heating (by using differential thermal analysis, DTA) shows a hierarchical change in phase transition, and particularly Ti5Si3 is in situ formed via a phase transition path TiSi2 → TiSi → Ti5Si4 → Ti5Si3. This is meaningful in materials design using a kinetics bias strategy. Microstructures of fully densified Ti5Si3/TiAl in situ composites have been observed by optical microscope.",

author = "Rao, \{K. P.\} and Du, \{Y. J.\} and Chung, \{J. C Y\} and Lau, \{K. C.\}",

year = "1999",

month = may,

day = "19",

doi = "10.1016/S0924-0136(99)00012-6",

language = "English",

volume = "89-90",

pages = "361--366",

journal = "Journal of Materials Processing Technology",

issn = "0924-0136",

publisher = "Elsevier B.V.",

note = "4th Asia Pacific Conference on Materials Processing (APCMP 1999) ; Conference date: 19-05-1999 Through 20-05-1999",

}

TY - JOUR

T1 - In situ composite formation in Ti-Al-Si ternary system

AU - Rao, K. P.

AU - Du, Y. J.

AU - Chung, J. C Y

AU - Lau, K. C.

PY - 1999/5/19

Y1 - 1999/5/19

N2 - Three stoichiometric TiAlSi-based metastable alloys (i.e. Ti-14Al-21Si, Ti-11Al-21Si and Ti-9Al-27Si, at.%) have been synthesized by mechanical alloying (MA). It has been found, by means of X-ray diffraction (XRD) and transmission electron microscope (TEM), that these metastable phases (or precursors) are mainly in nano-structures, with partially amorphous phases as for the alloy Ti-14Al-21Si. Importantly, investigation of these metastable phases during heating (by using differential thermal analysis, DTA) shows a hierarchical change in phase transition, and particularly Ti5Si3 is in situ formed via a phase transition path TiSi2 → TiSi → Ti5Si4 → Ti5Si3. This is meaningful in materials design using a kinetics bias strategy. Microstructures of fully densified Ti5Si3/TiAl in situ composites have been observed by optical microscope.

AB - Three stoichiometric TiAlSi-based metastable alloys (i.e. Ti-14Al-21Si, Ti-11Al-21Si and Ti-9Al-27Si, at.%) have been synthesized by mechanical alloying (MA). It has been found, by means of X-ray diffraction (XRD) and transmission electron microscope (TEM), that these metastable phases (or precursors) are mainly in nano-structures, with partially amorphous phases as for the alloy Ti-14Al-21Si. Importantly, investigation of these metastable phases during heating (by using differential thermal analysis, DTA) shows a hierarchical change in phase transition, and particularly Ti5Si3 is in situ formed via a phase transition path TiSi2 → TiSi → Ti5Si4 → Ti5Si3. This is meaningful in materials design using a kinetics bias strategy. Microstructures of fully densified Ti5Si3/TiAl in situ composites have been observed by optical microscope.

UR - https://www.scopus.com/pages/publications/0344240199

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0344240199&origin=recordpage

U2 - 10.1016/S0924-0136(99)00012-6

DO - 10.1016/S0924-0136(99)00012-6

M3 - RGC 21 - Publication in refereed journal

SN - 0924-0136

VL - 89-90

SP - 361

EP - 366

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

T2 - 4th Asia Pacific Conference on Materials Processing (APCMP 1999)

Y2 - 19 May 1999 through 20 May 1999

ER -

In situ composite formation in Ti-Al-Si ternary system

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