Document Details
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Document Type |
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Thesis |
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Document Title |
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A Study of the Thermal, Microstructure and Mechanical Properties of Some Sn-Zn-Cd Soldering Alloys دراسة الخصائص الحرارية والبنية التركيبية والميكانيكية لبعض سبائك اللحام قصدير- زنك- كادميوم |
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Subject |
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physics department |
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Document Language |
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Arabic |
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Abstract |
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The study of lead-free solder became an essential topic over the past few years due to the harmful effect of using lead on the health and environmental safety.
This work mentioned the influence of cadmium on the structure, mechanical and thermal behaviors of Sn-Zn-Cd solder alloys.
X-ray diffractometry (XRD), inverted metallurgical microscope, tensile tester, Vickers's hardness tester, differential scanning calorimetry, and flash technique were used to evaluate these effects.
The results of this study show that the Cd addition may form solid solution within Sn matrix in Sn-9wt.% Zn-1wt.% Cd and Sn-9wt.% Zn-2wt% Cd alloys while the Sn-9wt.% Zn –x wt.% Cd (x= 3, 4, 5) alloys exhibited additional constituent phase of Cd. The addition of Cd increased the average grain size of solder alloys. Stress-strain measurements were carried out on the test samples under constant strain rate of 2.8×10-2 s-1 at different temperatures along the range 403 up to 443 K. The modulus of elasticity, ultimate stress, yield stress, fracture stress, and the resilience for Sn-9wt.% Zn-x wt.% Cd (x=1, 2, 3, 4, 5) alloys decreases with increasing the temperature as well as the cadmium content at constant strain rate. The tensile creep test of Sn-9wt.% Zn-x wt.% Cd (x=1, 2, 3, 4, 5) alloys was performed at various elevated temperatures along the range 393 to 453 K. The values of activation energy and the exponent of the transient creep and the steady-state creep show that the mechanism controlling the transient creep is dislocation mechanism while the mechanism controlling the steady-state creep is volume self diffusion mechanism. Hardness of alloys decreases with increasing the cadmium content as well as the temperature. Thermal studies revealed that thermal diffusivity, thermal conductivity, and melting temperature of the samples decreased owing to the increase of cadmium content while specific heat capacities of the samples were increased. |
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Supervisor |
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Dr. Ali Mohamed Abdel-Daiem |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1434 AH
2013 AD |
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Co-Supervisor |
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Dr. Farag Al-Hazmi |
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Added Date |
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Monday, June 24, 2013 |
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Researchers
| مشاعل يحي الحربي | Al-harbi, Mashael Yahia | Researcher | Master | |
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