Interaction of Al2O3-ZrO2 fibers with a Ti-Al matrix during pressure casting

S. Nourbakhsh; F. L. Liang; H. Margolin

doi:10.1007/BF02656438

Interaction of Al₂O₃-ZrO₂ fibers with a Ti-Al matrix during pressure casting

S. Nourbakhsh, F. L. Liang, H. Margolin

Mechanical and Aerospace Engineering

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

Abstract

Electron and optical electron microscopy, together with energy dispersive X-ray (EDX) chemical microanalysis, were employed to examine the microstructure of a pressure-cast composite consisting of a Ti-48.4 at. pct Al-1 at. pct Mn matrix reinforced with DuPont's PRD-166 A1₂O₃ fibers containing 20 wt pct partially stabilized ZrO₂. The originally cylindrical fibers were found to have a scalloped surface, and a zone just below the surface was free of ZrO₂. In addition, the fibers contained entrapped TiAl, and a small portion of the fiber periphery was covered by ZrO₂ particles, which were free of the Y₂O₃ and HfO₂ oxides present in the ZrO₂ within the fibers. The matrix consisted of a mixture of TiAl and a lamellar structure of TiAl and Ti₃Al and contained Zr not originally present in the matrix alloy. An analysis of the origin of this microstructure is presented.

Original language	English (US)
Pages (from-to)	213-219
Number of pages	7
Journal	Metallurgical Transactions A
Volume	21
Issue number	1
DOIs	https://doi.org/10.1007/BF02656438
State	Published - Jan 1990

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General Engineering

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@article{ce404d89d03f4d508e899a3a4b44dca1,

title = "Interaction of Al2O3-ZrO2 fibers with a Ti-Al matrix during pressure casting",

abstract = "Electron and optical electron microscopy, together with energy dispersive X-ray (EDX) chemical microanalysis, were employed to examine the microstructure of a pressure-cast composite consisting of a Ti-48.4 at. pct Al-1 at. pct Mn matrix reinforced with DuPont's PRD-166 A12O3 fibers containing 20 wt pct partially stabilized ZrO2. The originally cylindrical fibers were found to have a scalloped surface, and a zone just below the surface was free of ZrO2. In addition, the fibers contained entrapped TiAl, and a small portion of the fiber periphery was covered by ZrO2 particles, which were free of the Y2O3 and HfO2 oxides present in the ZrO2 within the fibers. The matrix consisted of a mixture of TiAl and a lamellar structure of TiAl and Ti3Al and contained Zr not originally present in the matrix alloy. An analysis of the origin of this microstructure is presented.",

author = "S. Nourbakhsh and Liang, {F. L.} and H. Margolin",

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T1 - Interaction of Al2O3-ZrO2 fibers with a Ti-Al matrix during pressure casting

AU - Nourbakhsh, S.

AU - Liang, F. L.

AU - Margolin, H.

PY - 1990/1

Y1 - 1990/1

N2 - Electron and optical electron microscopy, together with energy dispersive X-ray (EDX) chemical microanalysis, were employed to examine the microstructure of a pressure-cast composite consisting of a Ti-48.4 at. pct Al-1 at. pct Mn matrix reinforced with DuPont's PRD-166 A12O3 fibers containing 20 wt pct partially stabilized ZrO2. The originally cylindrical fibers were found to have a scalloped surface, and a zone just below the surface was free of ZrO2. In addition, the fibers contained entrapped TiAl, and a small portion of the fiber periphery was covered by ZrO2 particles, which were free of the Y2O3 and HfO2 oxides present in the ZrO2 within the fibers. The matrix consisted of a mixture of TiAl and a lamellar structure of TiAl and Ti3Al and contained Zr not originally present in the matrix alloy. An analysis of the origin of this microstructure is presented.

AB - Electron and optical electron microscopy, together with energy dispersive X-ray (EDX) chemical microanalysis, were employed to examine the microstructure of a pressure-cast composite consisting of a Ti-48.4 at. pct Al-1 at. pct Mn matrix reinforced with DuPont's PRD-166 A12O3 fibers containing 20 wt pct partially stabilized ZrO2. The originally cylindrical fibers were found to have a scalloped surface, and a zone just below the surface was free of ZrO2. In addition, the fibers contained entrapped TiAl, and a small portion of the fiber periphery was covered by ZrO2 particles, which were free of the Y2O3 and HfO2 oxides present in the ZrO2 within the fibers. The matrix consisted of a mixture of TiAl and a lamellar structure of TiAl and Ti3Al and contained Zr not originally present in the matrix alloy. An analysis of the origin of this microstructure is presented.

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Interaction of Al₂O₃-ZrO₂ fibers with a Ti-Al matrix during pressure casting

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