| Fabrication of ZrO2/Mo-Si/Ni Functionally Graded Material by Dip-Coating |
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| 引用本文： | MingweiLI JingchuanZHU等. Fabrication of ZrO2/Mo-Si/Ni Functionally Graded Material by Dip-Coating[J]. 材料科学技术学报, 2003, 19(1): 63-65 |
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| 作者姓名： | MingweiLI JingchuanZHU等 |
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| 作者单位： | SchoolofMaterialsScienceandEngineering,HarbinInstituteofTechnology,Harbin150001,China |
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| 摘 要： | A slurry dip-coating technique was developed for fabrication of ZrO2/Mo-Si/Ni functionally graded material (FGM) on the stainless steel substrate,The rheological behavior of ZrO2-Ni-ethanol slurry was characterized by viscosity test,The amount of polyvinyl butyral (PVB) additives,which ser5ved as the dispersant and binder in ZrO2-Ni-ethanol slurry ,was optimized,The results showed that the characters of mixed slurries,with added 9 vol,pct (relatively to total powders )MoSi2 powders prepared by mechanical alloying changed little ,The stainless steel substrate was coated several times by dipping in the slurries,and followed by drying in air every dipping,After debinding in Ar in graphite die,the coated FGM plate was finally hot pressed at 1300 ℃ for 1 h under the pressure of 5 MPa in Ar in the same die,Microstructural observations of the sintered FGM specimens revealed that the graded layers were formed on the stainless steel substrate ,in which no cracks were observed.
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| 关 键 词： | 浆料浸涂技术 ZrO2/Mo-Si/Ni 功能梯度材料 PVB 显微结构 |
Fabrication of ZrO2/Mo-Si/Ni Functionally Graded Material by Dip-Coating |
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| Mingwei LI,Jingchuan ZHU,Zhongda YIN,Gang ZENG. Fabrication of ZrO2/Mo-Si/Ni Functionally Graded Material by Dip-Coating[J]. Journal of Materials Science & Technology, 2003, 19(1): 63-65 |
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| Authors: | Mingwei LI Jingchuan ZHU Zhongda YIN Gang ZENG |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | A slurry dip-coating technique was developed for fabrication of ZrO2/Mo-Si/Ni functionally graded material (FGM)on the stainless steel substrate. The rheological behavior of ZrO2-Ni-ethanol slurry was characterized by viscositytest. The amount of polyvinyl butyral (PVB) additives, which served as the dispersant and binder in ZrO2-Ni-ethanolslurry, was optimized. The results showed that the characters of mixed slurries with added 9 vol. pct (relativelyto total powders) MoSi2 powders prepared by mechanical alloying changed little. The stainless steel substrate wascoated several times by dipping in the slurries, and followed by drying in air every dipping. After debinding in Arin graphite die, the coated FGM plate was finally hot pressed at 1300℃ for 1 h under the pressure of 5 MPa in Arin the same die. Microstructural observations of the sintered FGM specimens revealed that the graded layers wereformed on the stainless steel substrate, in which no cracks were observed. |
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| Keywords: | Slurry dip-coating technique Functionally graded material (FGM) Polyvinyl butyral (PVB) |
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