کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9804035 1516477 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbothermic reduction of anatase and rutile
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Carbothermic reduction of anatase and rutile
چکیده انگلیسی
The carbothermic reduction of anatase and rutile to TiC was investigated using a combination of thermogravimetric analysis and X-ray diffraction. Samples premilled for 50 h prior to heat treatment showed a much greater extent of reduction compared with the unmilled powders. Heating the rutile up to 800 °C and anatase up to 870 °C showed no evidence for reduction with the observed mass loss attributed to desorption of gas. After heating to 800 °C, most of the anatase has transformed to rutile. The reduction of rutile started at ∼830 °C whilst anatase underwent reduction at 870 °C. The initial identified products were Ti5O9 and Ti4O7 with the latter being the last apparently stable phase prior to TiC formation. The TiC formed from anatase was apparently stoichiometric whilst that from rutile was clearly sub-stoichiometric. Reasons for the difference in reduction behaviour are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 390, Issues 1–2, 22 March 2005, Pages 138-143
نویسندگان
, , ,