Gasar工艺及其衍生技术的研究进展.pdfVIP

17 3 Vol. 17, No. 3 2 0 1 0 6 Metallic Functional M aterials June, 2010 Gasar * 王志阳, 沈以赴 ( , 210016) : - ( Gasar ) ( Gasarite) , , - - Gasarite , Gasarite : - ; ; ; :T G2 9 : A : 1005- 8192(2010) 03- 0091- 05 Progress in Gasar Process and its Derivative Techniques WANG Zh-i yang, SHEN Y-i fu ( College of Materials Science and T echnology, Nanjing University of Aeronaut ics and Astronautics, Nanjing 210016, Jiangsu, China) Abstract: Solid-gas eutect ic unidirectional solidification ( Gasar process) is a novel technology for fabricating lotus- or radia-l t ype ordered porosity structure. On the basis of the Gasar process, three innovative techniques, i. e. thermal decomposition method (TDM) , continuous zone melt ing and continuous casting techniques, are developed currently. The primary research progress of these technologies w ere introduced. Moreover, the theoretical development of pore nucleation and solid-gas eutectic growth during the solid-gas eutectic unidirectional solidification as w ell as the tech- nological measures directing to the control and optimization of the Gasarite pore structure w ere mainly summarized. Meanw hile, the property characterist ics of Gasarite mat erials and their prospective applications w ere also intro- duced. Key words: solid-gas eutectic grow th; pore nucleation; unidirectional solidification; ordered porosity structure - ( Gasar ) , , Gasarite Shapovalov[ 1] , , Gasar ;