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《Materials Science and Engineering of Powder Metallurgy》 2006-02
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Solution of diffusion equations and distribution of alloying elements in sintered materials

WANG Chong-lin(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)  
A series of integration solutions for differential diffusion equations in several conditions were discussed.The value of error function erf(z) was calculated by the SIMPSON method.A FORTRAN program was successfully realized for diffusion equations of extended source of limited extent.The calculation results for the diffusion of alloying elements such as C,Co,Cr,Mn,Mo,Ni and V in ironbased alloys show the diffusion distance especially for Ni and Mo can reach only 1~3μm in sintering temperature range of 11201150℃;to refine the alloying particle size down to the scale of micrometers is an effective way to get homogeneous distribution,which should be benefit for improving its mechanical properties.
【CateGory Index】: TG115.2
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