نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 دانشگاه تهران، دانشکده علوم و فنون نوین، بخش مهندسی پزشکی، تهران، ایران

2 دانشگاه شریف، دانشکده مهندسی مواد،تهران ، ایران

چکیده

در این پژوهش مراحل ساخت کامپوزیت زمینه فلزی پایه فولاد زنگ­نزن حاوی ذرات کاربید تیتانیم به روش قالب­گیری تزریقی پودر (PIM) مورد بررسی قرار گرفت. اثر عواملی مانند نرخ برش، اضافه نمودن کاربید تیتانیم، دما و بار جامد بر روی رفتار رئولوژی خوراک­های مورد استفاده در PIM مورد بحث و بررسی قرار گرفت. بر اساس نتایج  به ­دست آمده بهترین خوراک و دمای مناسب برای فرایند تزریق تعیین شد. بر اساس معادلات مختلف حداکثر بارجامد بحرانی مورد محاسبه قرار گرفت. بعد از این مراحل فرایند تزریق در دو دمای 93 وoC115 و در دو فشار 5 وMPa10 انجام شد. نتایج نشان داد که با افزایش دما از 60 به 70 درجه سانتی­گراد گرانروی خوراک ها تقریبا 20% کاهش پیدا می­کند اما از دمای 70 به 80 درجه تقریبا ثابت می­ماند. میزان گرانروی تمام خوراک­ها کمتر از pa.s1000 بوده است. میزان بار جامد بحرانی محاسبه شده در این تحقیق نیز 64% حجمی می­ باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Optimization of Powder Injection Molding Process Parameter for Production SS316/TiC Composite for Biomedical Application

نویسندگان [English]

  • Mehrdad Khakbiz 1
  • Abdolreza Simchi 2

1 University of Tehran, Faculty of New Science and Technology, Division of Biomedical Engineering, Tehran, Iran

2 Sharif university of Technology, Department of Materials Science and Engineering, Tehran, Iran

چکیده [English]

The Current investigation was designed to study different steps of powder injection molding of Stainless Steel/TiC Composite. So a multi-component binder was selected and its melting, recrystallization and degradation temperatures were evaluated via DSC and TGA experiments. In order to study the rheological behavior of feedstock, a capillary rheometer was incorporated and the effects of shear rate, TiC content, temperature and solid loading on rheological behavior of feedstock were investigated and based on the results the best feedstock and processing temperature were selected. In the next step, some samples were injection molded at two temperatures (93 and 115 oC) and two pressures (5 and 10 MPa). Results showed that by increasing temperature from 60oC to 70oc the viscosity decreased 20% but will be stable in higher temperature. The viscosity of all sample was below 1000 Pa.s. the calculated solid loading was 64%. By adding TiC particles, the green density of samples decreased from 4.85 gr/cm3 to 4.7 gr/cm3.

کلیدواژه‌ها [English]

  • Powder Injection Molding
  • Composite
  • Rheology
  • Stainless steel
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