کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1634989 1007009 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and properties of in situ synthesized TiB2+WC reinforced composite coatings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Microstructure and properties of in situ synthesized TiB2+WC reinforced composite coatings
چکیده انگلیسی
Nickel-based composite coatings reinforced by in situ synthesized TiB2 and WC particles were deposited on stainless steel by laser cladding, and their microstructure and mechanical properties were investigated. The results show that the coatings are mainly composed of γ-Ni cellular dendrites and dispersed spherical/strip/network shaped TiB2 and equiaxial WC particles. The initial WC particles are dissolved to become fine and mostly dispersed within γ-Ni cellular dendrites. The coating prepared at a special laser energy of 0.225 kJ·mm−2 is uniform, continuous, and free of pores and cracks. With the decrease in special energy density, TiB2 phase changes from fine spherical particles which cluster together to strip shape with different morphologies and further crystallizes to form network structure, and the dispersion zone also gradually changes from intragranular to intergranular phase. The coating possesses a higher microhardness compared with the substrate, and it has a good metallurgical bond with the substrate and excellent cracking resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metals - Volume 27, Issue 5, October 2008, Pages 451-456
نویسندگان
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