توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Mechano–chemical synthesis of NiAl–TiC nanostructure powder
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
NiAl–TiC nanocomposite was successfully synthesized via a ballmilled mixture of Ni, Al, Ti and graphite
powders. The structural and morphological evolutions of the powders were studied by Xray diffraction (XRD) and
scanning electron microscopy, respectively. Results show that NiAlTiC composite was obtained after 6h ofmilling
The mean grain size of 6 and 10nm were attained for NiAl and TiC at the end of milling, respectively. An annealing of
h milled sample at 600 C led to the formation of Ni (Al,Ti,C) solid solution. NiAlTiC nanocomposite that was
formed in the 12 h milled sample is stable during an annealing at 600 C. The mean grain size of NiAl at the 12h milled
powder increased during annealing at 600C. Maximum micro hardness value of 8.7 GPa was acquired from the 12h
milled powder.<\div>

۲Investigation of the Microstructure and Wear Behavior of In–Situ High Chromium Steel\TiC Composites
نویسنده(ها): ، ،
اطلاعات انتشار: دومین کنفرانس بین المللی کامپوزیت، سال
تعداد صفحات: ۶
This study deals with the processing, microstructure, and wear behavior of low volume fractions of TiC reinforced high chromium steel matrix composites. Composite processing was performed in a high frequency induction furnace while mechanical stirring assisted uniform dispersion of second phase particles into the molten steel. The in–situ melting of 70Cr2 steel and ferrotitanium (Fe–70%Ti) caused reaction between carbon and titanium which produced titanium carbide particles within the melt. Type and amount of matrix phases, shape, size, and distribution of the secondary phase were recognized by scanning electron microscopy (SEM), optical microscope (OM) equipped with image analyzer, micro hardness and quantometry. The density of the samples was measured by the Archimedes’s method and the wear behavior of the unreinforced 70Cr2 alloy and composite samples were investigated using a pin–on–disc test at room temperature under dry conditions.The result revealed that these composites can be produced successfully by this technique and low volume fractions of TiC particles are distributed uniformly in the steel matrix phase. Also it has been found that with the fabrication of low volume fraction of TiC particles in the high chromium steel matrix the hardness and wear resistance of the composite significantly increased.<\div>
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