کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1603187 1515975 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and microstructure evolution during vacuum sintering of Mo2FeB2 based cermets
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and microstructure evolution during vacuum sintering of Mo2FeB2 based cermets
چکیده انگلیسی
Mo2FeB2 based cermets were prepared by vacuum sintering at different temperatures and with different holding times. The phase transformation and microstructure evolution were studied by using scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). It was found that the hard phase Mo2FeB2 was produced in the compact at the stage of solid phase sintering by the reaction Mo and Fe2B, which exhibited an equiaxed morphology. An extremely rapid densification occurred in the temperature ranging from 1050 °C to 1080 °C, and almost full densification was obtained at the temperature of 1080 °C without holding time. With an increase of liquid phase sintering temperature, the cermets exhibited a relatively homogenous microstructure, accompanied by an in situ growth of elongated Mo2FeB2 grains. Abnormally large and faceted Mo2FeB2 grains occurred during the isothermal hold at 1320 °C. These abnormal grains usually coalesced with surrounding grains and grain boundaries were formed between them.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 45, July 2014, Pages 48-52
نویسندگان
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