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	Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting
	Huang, Y. ; Ma, L.G. ; Le, H.R. ; Yang, J.L.
	2010-05-10 ; 2010-05-10
关键词	Experimental/ casting ceramic products ceramics crystal microstructure injection moulding internal stresses solidification/ pressure assisted gel casting pressure induced solidification colloidal injection moulding engine turbines biomedical implants inner stress temperature gradient microstructural defects homogeneity reliability ceramic parts ceramics forming proces conventional injection moulding nonuniform solidification stiffness colloidal forming processes ceramic products/ A8120L Preparation of ceramics and refractories A8130F Solidification A6470D Solid-liquid transitions A6480G Microstructure E1520G Forming processes E1780 Products and commodities E1710 Engineering materials
中文摘要	Forming process plays an important role in the homogeneity and reliability of advanced ceramic products. Inspired by the surprising observation of pressure-induced solidification in colloidal forming processes, the authors have developed a new ceramics forming process, colloidal injection moulding, with the potential of forming large ceramic parts of complex shapes such as engine turbines and biomedical implants. This process combines the advantages of the conventional injection moulding and gel-casting processes of ceramics. Not only the efficiency but also the homogeneity of the green body is greatly improved owing to the pressure-induced solidification. It is also found that the inner stress generated by non-uniform solidification due to temperature gradient is responsible for the origination of microstructural defects in green body during colloidal-forming processes. A new strategy is taken to reduce the inner stress by adjusting the stiffness of the green body using a moderator additive. Ceramic products with complex shape such as engine turbines have successfully been fabricated with reduced defects.
语种	英语 ; 英语
出版者	Elsevier ; Netherlands
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20511]
专题	清华大学
推荐引用方式 GB/T 7714	Huang, Y.,Ma, L.G.,Le, H.R.,et al. Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting[J],2010, 2010.
APA	Huang, Y.,Ma, L.G.,Le, H.R.,&Yang, J.L..(2010).Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting..
MLA	Huang, Y.,et al."Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting".(2010).

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