کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1604121 1516000 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Ni–Al SHS reaction on diamond grit for fabrication of diamond tool material
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of Ni–Al SHS reaction on diamond grit for fabrication of diamond tool material
چکیده انگلیسی

Diamond grits were added to Ni–Al self-propagating high-temperature synthesis system for fabrication of diamond tool materials. The propagating processes and the microstructure of the reacted composite were investigated. The surface characteristics of diamond grits after Ni–Al SHS reaction were examined by scanning electron microscopy (SEM) and Raman spectroscopic analysis. Owing to the presence of diamond grits, the flame-front propagation velocity of Ni–Al/diamond was reduced by 33% comparing to that of Ni–Al. Intermetallics such as NiAl, Ni2Al3, Ni3Al and NiAl3 were identified in the reacted Ni–Al/diamond composite. Due to the high temperature of Ni–Al SHS, some of the diamond grits’ surface was graphitised. There were a large number of craters on the surface of graphitised diamond grits, in which the spherical and rod-like graphite particles were found. The mean compressive strength of the SHS-treated diamond grits decreased about 20% comparing to that of the initial diamond grits.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 28, Issue 3, May 2010, Pages 416–423
نویسندگان
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