@article{msme2013126,
author={{Nwoye, C. I. and Agbo, A. O. and Nwogbu, C. C. and Neife, S. and Ameh, E. M.},
title={Reliability Level of Pb-Sb-Cu Alloy Electrical Resistance Dependence on Its Melting Temperature and Copper Input Concentration},
journal={Materials Science and Metallurgy Engineering},
volume={1},
number={2},
pages={42--49},
year={2013},
url={http://pubs.sciepub.com/msme/1/2/6},
abstract={This paper assesses the reliability level of Pb-Sb-Cu alloy electrical resistance dependence on its melting temperature and copper input concentration. The alloy was cast by pouring a stirred mixture of heated Pb-Sb alloy and powdered copper into a sand mould and then furnace cooled. Results of electrical test carried out indicate that the electrical resistance of the Pb-Sb-Cu alloy decreases with increase in the melting temperature of the Pb-Sb-Cu alloy. This invariably implied decrease in the electrical resistivity of the alloy. Increased copper addition (0.99-8.26 wt%) to the base alloy (Pb-Sb) also correspondingly decreased the electrical resistance. The experimental results were complement by results generated using a derived model. The validity of the two-factorial derived model expressed as: ¦Î = - 0.1248? - 0.0398? + 66.615 was rooted on the expression ¦Î - 66.615 = - 0.1248?<SUP> </SUP>- 0.0398? where both sides of the expression are correspondingly approximately equal. Statistical analysis of the experiment, derived model &amp; regression model-predicted results shows that the standard errors incurred in predicting the Pb-Sb-Cu alloy electrical resistance for each value of the melting temperature and copper input<SUB> </SUB>were 0.1247, 0.1722 &amp; 3.517 x 10<SUP>-5</SUP><SUP> </SUP>% and 0.4276, 0.1797<SUB> </SUB>&amp; 0.3593 % respectively. Evaluations indicate that Pb-Sb-Cu alloy electrical resistance per unit rise in the melting temperature and copper mass-input as obtained from experiment, derived model &amp; regression model-predicted results were 0.2507, 0.2309 &amp; 0.2496 ¦¸<SUP> </SUP>/¡ãC and 0.094, 0.0866 &amp; 0.0936 ¦¸<SUP> </SUP>/<SUP> </SUP>g respectively. Deviational analysis indicated that the maximum deviation of derived model-predicted electrical resistance from the experimental results was less than 3%. This translated into over 97% operational confidence and reliability level for the derived model and over 0.97 reliability coefficient for the Pb-Sb-Cu alloy electrical resistance dependence on the alloy melting temperature and copper input concentration.},
doi={10.12691/msme-1-2-6}
publisher={Science and Education Publishing}
}