Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/67642
標題: Effects of Ti interlayer on the microstructure of ion-plated TiN coatings on AISI 304 stainless steel
作者: Shieu, F.S.
薛富盛
Cheng, L.H.
Shiao, M.H.
Lin, S.H.
關鍵字: ion plating
steel
titanium nitride
transmission electron spectroscopy
(TEM)
transmission electron-microscopy
metal ceramic interfaces
residual-stress
hard coatings
films
adhesion
期刊/報告no:: Thin Solid Films, Volume 311, Issue 1-2, Page(s) 138-145.
摘要: The microstructure and chemistry of TiN coatings on AISI 304 stainless steel was analyzed by an energy filtering transmission electron microscope (TEM) equipped with an electron energy loss spectroscopy (EELS) detector. Two types of TiN-coated specimens, with and without a Ti interlayer. were prepared by a hollow cathode discharge ion plating coater. For the TiN directly coated on steel, it is found that the grain size, texture, and chemistry of the coating is thickness dependent. The large residual stresses in TiN caused the formation of dislocation networks and cell walls in the steel, and often resulted in early failure of the coating upon subsequent handling. Compared to the TiN-steel system, the introduction of a Ti interlayer between TiN and steel gives rise to the different results. The microstructure of TiN coatings with a Ti interlayer is mainly composed of columnar grains whose size is found to be relatively independent of coating thickness. Near the TiN-Ti interface, it is observed that many of the TiN grains grew out of the underlying Ti crystallites. Consequently, a very good epitaxial relation is established between TiN and Ti. The texture of the TIN coatings with a Ti interlayer, therefore, showed enhanced preferred orientation when approaching the TiN-Ti interface. From the calculation of the unrelaxed thermal stress based on a bilayer model, it is demonstrated that the presence of a Ti interlayer between TiN and steel can dramatically reduced the thermal stress in the TiN coating. (C) 1997 Elsevier Science S.A.
URI: http://hdl.handle.net/11455/67642
ISSN: 0040-6090
文章連結: http://dx.doi.org/10.1016/s0040-6090(97)00444-6
Appears in Collections:工學院

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.