Basic Materials Studies by P N Peapell and J A. Belk (Auth.)

By P N Peapell and J A. Belk (Auth.)

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If it is not found, the fact is recorded at line 530, the data count is restored at line 540 and the program restarted. (5) T h e second element is similarly entered and searched at line 640-700. (6) Lines 710-730 calculate the size difference between the two atoms and if this is too large, indicate that primary solubility is unfavourable due to the difference in size. T h e variable Β is assigned a value of 1 so that extensive solubility is not calculated later. (7) Lines 760 and 770 compare the electro-negativities of the two elements and if the difference between these is too great, indicate that solubility may be restricted due to c o m p o u n d formation.

0 1 < ^ M n0 . 6 5 < ^ M o0 . 0 K J r Ni 0 . 1 Calculation of activation energy - diffusion of Cu in C u O 59 is the a n o d e and, therefore, will c o r r o d e , involves the use of the Nernst equation. g.

4 % . In this particular case some 5 % of the material solidified as eutectic solid at the end of the solidification process. " PRINT "SOLID"/. AV. SOLID 7. 8: Quantitative metallography 390 400 410 420 430 440 450 460 470 480 490 500 510 41 M PRINT "RANGE OF SOLID | C 1 | " TO " J N J " %A" END REM SOL Si LIQ TEMP T1-X- RETURN REM COMP SOL Sc LIQ N*(X-T)/(X-Y)*U D«C1+/(Tl-Y)*(U-Cl>/2 C2«(X-T)/(X-Y)»V P» RETURN Program notes (1) Lines 120-170 allow the melting point, eutectic t e m p e r a t u r e , m a x i m u m solid solubility, eutectic composition and initial composition of liquid to be entered.

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