آلیاژ سازی مکانیکی و ساخت قطعات آلیاژی Zn-4Mn از طریق SPS به‌منظور استفاده در کاشتنی‌های کوتاه مدت
محورهای موضوعی : سنتز موادناهید حسن زاده نعمتی 1 , محمد بابایی 2 , عرفان چیذری 3 , داود ملک پژو 4
1 - گروه مهندسی پزشکی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران
2 - دانشگاه آزاد اسلامی
3 - دانشگاه آزاد اسلامی
4 - گروه مهندسی پزشکی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران
کلید واژه: عملیات حرارتی, آلیاژ سازی مکانیکی, زیست تخریب پذیر, آلیاژ روی-منگنز, تف جوشی جرقه پلاسما,
چکیده مقاله :
آلیاژهای بر پایه روی (Zn) با کنترل فرآیند تولید قابلیت ظهور طیف گسترده ای از خواص مورد نیاز برای کاربرد در کاشتنی‌های کوتاه مدت درون تنی را دارند. برای این منظور در پژوهش حاضر پودر آلیاژی با ترکیب Wt Mn%4-Zn از طریق آلیاژسازی مکانیکی در سه زمان 10، 20 و 30 ساعت تهیه و قطعات آلیاژی از طریق فرآیند تف جوشی جرقه پلاسما (SPS) ساخته شدند. عملیات حرارتی قطعات تولیدی در سه دمای150، 200و250 درجه سانتی‌گراد انجام گردید. نمونه‌ها با استفاده از آزمون‌های پراش اشعه ایکس (XRD) ، خوردگی پلاریزاسیون دینامیکی و ارزیابی زنده مانی سلولی MTT مشخصه یابی شدند. همچنین مورفولوژی سطح نمونه ها با استفاده از میکروسکوپ الکترونی روبشی (SEM) مورد بررسی قرار گرفت. نتایج نشان داد افزایش زمان آسیاب به 30 ساعت ترکیبی همگن تر ایجاد نموده، همینطور نمونه عملیات حرارتی شده در دمای °C250 دارای بالاترین میزان مقاومت به خوردگی است. زنده مانی سلولی نمونه عملیات حرارتی شده در این دما نسبت به نمونه‌های دیگر زنده مانی بیشتری نشان داد. انتظار می رود نتایج این مطالعه در کاربردهای کوتاه مدت درون تنی مورد استفاده قرار گیرد.
Zn-based alloys (Zn) with control of the production process have the potential to give rise to a wide range of properties required for use in short-term implants. For this purpose, in the present study, a Zn-4wt%Mn alloy was prepared by mechanical alloying in three times of 10, 20 and 30 hours. Then some blocks were made by Spark plasma sintering (SPS) process. Heat treatment of manufactured parts was performed at three temperatures of 150, 200 and 250 ° C. The samples were characterized using XRD, dynamic polarization corrosion test and MTT cell viability evaluation. Also, the surface morphology of the samples was determined using scanning electron microscopy (SEM). The results showed that increasing the milling time to 30 hours created a more homogeneous composition, and the heat treated sample at 250 ° C had the highest corrosion resistance. Cell viability of the heat treated samples at this temperature showed higher viability than other samples. The results of this study are expected to be used in short-term implants.
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