علوم و فناوری کامپوزیت

بررسی تجربی خواص مکانیکی، خوردگی و زیست‌سازگاری کامپوزیت Ti/RGO ساخته شده با روش ترکیبی سینترینگ پلاسمای جرقه‌ای و اکستروژن برشی ساده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، مهندسی مکانیک، دانشگاه صنعتی بیرجند، بیرجند .

2 استادیار، مهندسی مکانیک، دانشگاه صنعتی بیرجند، بیرجند.

3 دانشیار، مهندسی مواد، دانشگاه صنعتی بیرجند، بیرجند.

چکیده

با توجه به اهمیت بالای تیتانیوم خالص در صنعت پزشکی و ضعف خواص مکانیکی و فیزیکی این فلز، در این تحقیق به جهت رشد خواص مکانیکی و در عین حال بهبود خواص زیستی، کامپوزیت تیتانیوم خالص تقویت شده با نانوذرات اکسید گرافن احیا شده با استفاده از روش SPS ساخته و در دمای اتاق با روش اکستروژن برشی ساده تحت فرآیند تغییرشکل پلاستیک شدید قرار گرفت. تأثیر سینترینگ پلاسما ، فرآیند تغییرشکل پلاستیک شدید و قرارگیری در محلول شبیه‌ساز بدن بر تغییرات خواص مکانیکی، خوردگی و زیستی این گرید تیتانیوم بررسی شد. در اثر افزودن مقدار 1/0 درصد وزنی RGO به تیتانیوم خالص و سپس ریزدانه کردن ساختار کامپوزیت تولیدی، با یک مرحله اکستروژن برشی ساده، میزان ایجاد کلسیم (استخوان سازی) در بدنه و بعد از قرارگیری 28 روزه در محلول شبیه ساز بدن، بیشتر و دارای کیفیت بالاتری نسبت به نمونه خالص سینتر شده است. همچنین میزان استحکام کششی این نمونه نیز بعد از قرارگیری 28 روزه در محلول شبیه ساز بدن بیشتر از نمونه خالص سینتر شده بوده به طوری که استحکام کششی نمونه خالص و نمونه دارای RGO ریزدانه شده به ترتیب 750 و 4/1089 مگاپاسکال ثبت شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental investigation of mechanical properties, corrosion and biocompatibility of Ti/RGO composite made by the combined method of spark plasma sintering and simple shear extrusion

نویسندگان [English]

  • Sayyed Mohammad Reza Sedehi 1
  • Mohammad Khosravi 2
  • Yadollah Yaghoubinezhad 3

1 Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran.

2 Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran.

3 Department of Materials Engineering, Birjand University of Technology, Birjand, Iran.

چکیده [English]

Considering the high importance of pure titanium in the medical industry and the weak mechanical and physical properties of this metal, in this research, in order to develop mechanical properties and at the same time improve biological properties, pure titanium composite reinforced with regenerated graphene oxide nanoparticles using the method SPS was fabricated and subjected to severe plastic deformation at room temperature by a simple shear extrusion method. The effect of plasma sintering, severe plastic deformation process and placement in a body simulating solution on changes in the mechanical, corrosion and biological properties of this titanium grade was investigated. As a result of adding 0.1% by weight of RGO to pure titanium and then fine-granulating the produced composite structure, with a simple shear extrusion step, the amount of calcium (bone formation) in the body and after 28 days in the body simulating solution, more and it has a higher quality than the pure sintered sample. Also, the tensile strength of this sample after 28 days in the body simulating solution was higher than the pure sintered sample, so that the tensile strength of the pure sample and the sample with fine-grained RGO were recorded as 750 and 1089.4 MPa, respectively.

کلیدواژه‌ها [English]

  • Titanium
  • spark plasma sintering
  • corrosion
  • simple shear extrusion
  • biocompatibility
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علوم و فناوری کامپوزیت
دوره 9، شماره 1
خرداد 1401
صفحه 1926-1921
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