Abstract
A type of zirconia-toughened alumina (ZTA) ceramic-lined composite steel pipe was fabricated by using self-propagation high-temperature synthesis and centrifugal casting technique. The microstructure and phase constituents of ZTA ceramic layer were analyzed by means of optical microscope, scanning electron microscope and X-ray diffractometer (XRD). The fracture toughness of ceramic layers and mechanical shock of Al2O3 and ZTA ceramic-lined composite pipes were measured using Vickers indentation microfracture method and the repetitive impacting method. The results show that the phase constituents of ZTA ceramic layer were Al2O3, FeAl2O4 and t-ZrO2 phases, and no m-ZrO2 phase was detected by XRD. Addition of ZrO2 reduced the width of Al2O3 dendrites and led to formation of a microstructure with fine ZrO2 particles distributed at boundaries of Al2O3 dendrites. The fracture toughness was increased from 0.56 MPa m1/2 of Al2O3 ceramic layer to 5.74 MPa m1/2 of ZTA ceramic layer. The mechanical shock resistance at the center of the ceramic-lined composite pipe was increased from twice to 19 times after addition of ZrO2 into the Al2O3 matrix.
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An, J., Zhao, J., Su, Z.G. et al. Microstructure and Mechanical Properties of ZTA Ceramic-Lined Composite Pipe Prepared by Centrifugal-SHS. Arab J Sci Eng 40, 2701–2709 (2015). https://doi.org/10.1007/s13369-015-1747-1
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DOI: https://doi.org/10.1007/s13369-015-1747-1