ISSN:
1433-075X
Keywords:
Key words Amorphous ceramic fiber
;
Melt extraction method
;
Endothermic reaction
;
Supercooled liquid state
;
Viscous flow deformation
;
Glass transition temperature
;
Nanocrystalline
;
Amorphous matrix
;
Heat treatment
;
Crystallization
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A high-strength ceramic Al31Gd9O60 continuous fiber with a fiber diameter of about 20 µm and an amorphous structure could be made successfully by using the melt extraction method. This fiber can be freely shaped by viscous flow deformation in the supercooled liquid state (about 1193 K). The fiber strength is about 2 GPa and this strength is maintained up to around 973 K. A high-strength ceramic continuous fiber with a uniform GdAlO3 nanocrystalline in an amorphous matrix can also be obtained with a suitable crystallization from the amorphous state by heat treatment. The heat resistance, Young’s modulus, and other properties are therefore improved. The amorphous ceramic fiber is promising as a ceramic that can be easily shaped at a relatively low temperatures (around 1193 K) in agreement with temperature range of superplastic processing of Ti alloys.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100190050002
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