کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1603081 1515972 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of soaking time on the friction properties of polycrystalline diamonds
ترجمه فارسی عنوان
اثر زمان خیس شدن بر خواص اصطکاک الماس های پلی کریستالی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• The friction behavior of PCDs soaked for different periods were evaluated.
• The relationship between chemical transformations and soaking time was studied.
• The two-dimensional and three-dimensional surface morphologies were examined.

The friction behaviors of polycrystalline diamonds (PCD) soaked for different periods at temperatures of 700 °C, 800 °C and 900 °C were evaluated using a ball-on disk tribometer in air. X-ray diffraction experiments were performed to study the chemical transformation of the surface of PCD. The two-dimensional and three-dimensional surface morphologies of PCDs were examined by scanning electron microscopy and atomic force microscopy, respectively. Results show that the friction coefficient and average surface roughness (Ra) are not sensitive to the soaking time at 700 °C. Meanwhile, no special chemical transformations were detected on the surface of PCD, except for the oxidation of Co when the soaking time exceeded 20 min. The value of Ra was observed to decrease slightly (from 79.5 nm to 91.0 nm) with the increase in soaking time at 800 °C while an outstanding decrease in the average friction coefficient of PCD was observed when the soaking time exceeded 60 min due to the transformation of diamond into graphite. The average value of the friction coefficient decreased greatly with the increase in soaking time at 900 °C due to the enhancement in the graphitization of diamond.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 48, January 2015, Pages 82–88
نویسندگان
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