کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1524822 1511833 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Porous nano-Al2O3/Fe–Cr–Ni composites fabricated by pressureless reactive sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Porous nano-Al2O3/Fe–Cr–Ni composites fabricated by pressureless reactive sintering
چکیده انگلیسی

Porous in situ nano-Al2O3 reinforced Fe–Cr–Ni metal matrix composites (MMCs) were fabricated from a mixture of Al/nano-Fe2O3/Cr/Ni powders via pressureless reactive sintering at 700–800 °C for 1–2 h. X-ray diffraction (XRD) demonstrated that the porous composites produced at 800 °C for 2 h consisted of Al2O3, Cr0.7Fe0.36Ni2.9 and Fe–Cr phases generally. Scanning electron microscopy (SEM) showed that the Al2O3 particles were ultrafine and uniformly distributed in the metal matrix. The pore sizes ranged from 1 μm to 20 μm for the sintered porous composites fabricated at 800 °C for 2 h. The resultant porous composite prepared under prepressing pressure of 200 MPa before sintering had more homogeneous and finer pore structure, lower porosity and higher bending strength and fracture toughness than those prepared under prepressing pressure of 5–100 MPa.


► Porous Al2O3/Fe–Cr–Ni composites were prepared via pressureless reactive sintering.
► Porous structure became homogeneous with increasing of the prepressing pressure.
► Mechanical properties were influenced by pore structure and content of metal phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 128, Issues 1–2, 15 July 2011, Pages 24–27
نویسندگان
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