کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7998774 1516249 2015 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interface characteristics and performance of pre-brazed diamond grains with Ni-Cr composite alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Interface characteristics and performance of pre-brazed diamond grains with Ni-Cr composite alloy
چکیده انگلیسی
This study aims to improve the bonding strength of diamond abrasive grains to the matrix in sintering diamond segments. To achieve this goal, a new method of surface metallization of diamonds was developed by brazing using Ni-Cr composite alloy. The diamonds metallized by brazing are called pre-brazed diamonds. Brazing equipment was a vacuum resistance furnace. Diamond segments consisting of the pre-brazed diamonds and the metal matrix were fabricated. The static compressive strength and impact toughness of the pre-brazed diamonds were measured. The bending strength of the segments was also measured. The interfacial microstructure of the pre-brazed diamonds and the segment fracture surface were characterized. The compressive strength and impact toughness of the pre-brazed diamonds peaked when 30 wt.% Ni-Cr alloy was used in the Ni-Cr composite alloy. Elemental distribution showed that Cr mainly concentrated at the joining interface of the pre-brazed diamonds. An interfacial resultant composed of Cr3C2 and Cr7C3 was formed at the joining interface of the pre-brazed diamonds. A strong bond was formed at the joining interface between the pre-brazed diamonds and the metal matrix when sintering diamond segments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 644, 25 September 2015, Pages 626-631
نویسندگان
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