Methods for determination of effective diffusion coefficients in ternary alloys (II). Indirect methods of calculating ternary diffusion matrix

✍ Scribed by M. T. Malik; Prof. Dr. sc. techn D. Bergner

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 292 KB
• Volume: 20
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170201216

✦ Synopsis

Indirect Mothods of Calculating Ternary Diffusion Matrix

We siimmarised, in part one of this paper, procedures of measuring diffusion matrix in thrce-component single phase alloys direct from the concentration-distribution profiles in infinite diffusion couples. In this paper (Part XI) some procedures have been outlined which enable calculate ternary diffusion matrix from easily measurable tracer coefficienh in ideal and non-ideal single phase solid solutions. These procedures have becn illustrat,ed with examplcs, so that i t becomes apparant that in many cases the experimental difficiilties facctl by t,he experimentalists in dir measurement of t,erriary diffusion coofficicni.s can tw rrtliiced t)o a large extent,.

Tm Tcil T dirser Arboit, wiirdcn die Met,hoden ziir Restimmiing dor Diffiisionsmat,rix in tlrcikornponeIit,ig~?n cinphasigen Legiernngm ails den Konzentrations-Wcg-l'rofilen n n - cmdlicher lliffiisionsproben ziisammengefaflt. Tn diesem Teil (11) werdcn einige Vcrfahrcn vorgest,ollt~, dir einr Herechnung der ternarm Diffiisionsmatrix ails den Icicht meBbaren Tracorkocffizient,cn in idoalcn und nicht-idealen Mischkristallen crmoglichen. 13s wird gezeigt, da13 die experimentellen Schwierigkeiten bei der direkt,en Hcstimmung von t>rr-iiiir~ri I)iffiisiorrslrocffiz~ont.e~~ in vielen Fallen wrscnt>iich verririgrl-t, werdrn kiinnrn.