کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1669422 1008883 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of shroud gas injection on material properties of tungsten layers coated by plasma spraying
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Effects of shroud gas injection on material properties of tungsten layers coated by plasma spraying
چکیده انگلیسی

Coated tungsten layers on stainless steel substrates were are produced by atmosphere plasma spraying. A shroud gas injection method was employed to reduce the ambient air entrainment into the plasma jets. The effects of shroud gas on the material properties of the tungsten layers were investigated by finding the dependence of oxide content, coating thickness and porosity on the injection velocity, shielding width, and mass flux of the shroud gas. The high injection velocity was more effective than thick shroud shielding in protecting the plasma jets from ambient air engulfment, and the mass flux of the shroud gas showed negligibly small effects on the suppression of air entrainment. Therefore, in order to produce a thick tungsten coating with low porosity and oxide contents, high injection velocity with a limited flow rate is a desirable operating condition for shroud gas injection in atmospheric plasma spraying.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 518, Issue 22, 1 September 2010, Pages 6369–6372
نویسندگان
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