مهندسی متالورژی

مهندسی متالورژی

ساخت فوم مس با روش فضا‌ساز و بررسی اثر حذف ذرات فضا‌ساز در طول فرآیند تف‌جوشی بر خواص مکانیکی آن

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناس ارشد، دانشکده مهندسی و علم مواد، دانشگاه شیراز، شیراز، ایران.
2 استاد، دانشکده مهندسی و علم مواد، دانشگاه شیراز، شیراز، ایران.
چکیده
در تحقیق حاضر، از روش فشرده‌سازی پودر مس و فضاساز برای ساخت فوم‌های مس با استفاده از فضا‌ساز NaCl استفاده شد. فوم‌های مس با درصد حجمی فضا‌ساز 60، 70و 80 ساخته شدند. مقایسه جذب انرژی فوم‌های مس پس از انحلال ذرات فضا‌ساز و بعد از فرآیند تف‌جوشی اولیه و بعد از فرآیند تف‌جوشی نهایی انجام شد. نتایج نشان داد که جذب انرژی فوم در روش انجام عملیات حذف ذرات فضاساز پس از تف‌جوشی اولیه تفاوت معنا‌داری نسبت به روش حذف فضاساز پس از فرآیند تف‌جوشی نهایی دارد، به طوری‌که که برای فوم با 60 درصد حجمی ذرات فضا‌ساز از 58/15 به 94/11 مگا‌ژول بر متر مکعب کاهش داشته است. همچنین از تصاویر میکروسکوپ الکترونی روبشی( SEM) برای بررسی اثر انحلال فضا‌ساز بر تخلخل‌ها استفاده شد و نشان داده شد که در صورت وجود نمک در مرحله انجام فرآیند تف‌جوشی نهایی و سپس انحلال آن، باعث آسیب دیدن دیواره‌های سلولی می‌شوند.
کلیدواژه‌ها

عنوان مقاله English

Product copper foam using the space holder method and investigating the effect of removing space holder particles during the sintering process on its mechanical properties

نویسندگان English

Armin Radmehr 1
Ramin Ebrahimi 2
Mohammad Hossein Paydar 2
1 M.Sc., Department of Materials Science and Engineering, Shiraz university, Shiraz, iran.
2 Professor, Department of Materials Science and Engineering, Shiraz university, Shiraz, iran.
چکیده English

In the present research, the compression method of copper powder and space holder was used to product copper foams using NaCl space holder. Copper foams were product with 60, 70 and 80 volume percentages of space holder. A comparison of the energy absorption of copper foams after the dissolution of space-forming particles and after the initial sintering process and after the final sintering process was done. The results showed that the energy absorption of foam in the method of removing the space holder after initial sintering has a significant difference compared to the method of removing the space holder after the final sintering process, so that for foam with 60% space holder by volume of 15.58 has decreased to 11.94 mega joules per cubic meter. Also, scanning electron microscope (SEM) images were used to investigate the effect of space holder dissolution on porosity and it was shown that if there is NaCl in the stage of the final sintering process and then its dissolution, it causes damage to the walls cellular.

کلیدواژه‌ها English

Powder Metallurgy
Floating Die
NaCl
Sintering
Foam
Space Holder

21

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  • تاریخ دریافت 22 تیر 1403
  • تاریخ بازنگری 03 مهر 1404
  • تاریخ پذیرش 01 مرداد 1403