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Design and Synthesis of Ti-ZrO_2 Functionally Graded Materials

Design and Synthesis of Ti-ZrO_2 Functionally Graded Materials
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摘要 Functionally graded materials (FGMs) based on titanium-zirconia system have been prepared by powder metallurgical method. The graded interlayer number and the compositional distribution have been designed by elastic finite element method. The interfacial microstructure between layers, the combining state of phases between Ti and ZrO2 have been investigated by means of XRD (X-ray diffraction), SEM (scanning electron microscope), EDS (energy dispersive spectrometer) and so on. The co-existing region of Ti and ZrO2 has been determined by thermodynamic calculation to control the sintering atmosphere. The experimental results show that the joint between Ti and ZrO2 phases is physical in this composite and ZrO2 mainly exists as tetragonal phase. The microstructure of Ti-ZrO2 system FGM exhibits a transition from a zirconia particle dispersion in a titanium matrix to an inverse dispersion of titanium in zirconia. The gradient structure of titanium and zirconia can relieve thermal stress. Functionally graded materials (FGMs) based on titanium-zirconia system have been prepared by powder metallurgical method. The graded interlayer number and the compositional distribution have been designed by elastic finite element method. The interfacial microstructure between layers, the combining state of phases between Ti and ZrO2 have been investigated by means of XRD (X-ray diffraction), SEM (scanning electron microscope), EDS (energy dispersive spectrometer) and so on. The co-existing region of Ti and ZrO2 has been determined by thermodynamic calculation to control the sintering atmosphere. The experimental results show that the joint between Ti and ZrO2 phases is physical in this composite and ZrO2 mainly exists as tetragonal phase. The microstructure of Ti-ZrO2 system FGM exhibits a transition from a zirconia particle dispersion in a titanium matrix to an inverse dispersion of titanium in zirconia. The gradient structure of titanium and zirconia can relieve thermal stress.
出处 《Journal of University of Science and Technology Beijing》 CSCD 2001年第1期48-52,共5页 北京科技大学学报(英文版)
基金 the National NatUralScience FoUndstion of China co.59872002).
关键词 Ti-ZrO2 system functionally graded material thermodynamic analysis finite element method Ti-ZrO2 system functionally graded material thermodynamic analysis finite element method
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参考文献3

  • 1Yeon-Gil Jung,Sung-Churl Choi,Chang-Seob Oh,Un-Gyu Paik.Residual stress and thermal properties of zirconia/metal (nickel, stainless steel 304) functionally graded materials fabricated by hot pressing[J].Journal of Materials Science.1997(14)
  • 2A. J. Ruys,J. A. Kerdic,C. C. Sorrell.Thixotropic casting of ceramic-metal functionally gradient materials[J].Journal of Materials Science.1996(16)
  • 3A. J. Markworth,K. S. Ramesh,W. P. Parks.Modelling studies applied to functionally graded materials[J].Journal of Materials Science.1995(9)

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