Effect of the porous stainless steel substrate shape on the ZrO 2 deposition by vacuum assisted dip-coating

2017 ◽  
Vol 42 (12) ◽  
pp. 7986-7996 ◽  
Author(s):  
Ignacio Contardi ◽  
Laura Cornaglia ◽  
Ana M. Tarditi
2005 ◽  
Vol 44 (21) ◽  
pp. 8025-8032 ◽  
Author(s):  
Jianhua Tong ◽  
Yukari Kashima ◽  
Ryuichi Shirai ◽  
Hiroyuki Suda ◽  
Yasuyuki Matsumura

2015 ◽  
Vol 654 ◽  
pp. 195-199 ◽  
Author(s):  
Františka Frajkorová ◽  
Esther Molero ◽  
Begoña Ferrari

Biodegradable polymers and bioactive ceramics are being combined in a variety of novel materials for tissue engineering scaffolds. These composite systems, which combine the useful mechanical properties of polymers with the bioactivity of ceramics, seem to be a promising choice for bone tissue engineering. In recent years, the use of biopolymers that gelate on cooling has received a lot of attention with regards to the production of laminates and coatings. In this work, we report the incorporation of hydroxyapatite (HA) into a gelatin coating on stainless steel substrate using colloidal processing technology. A titania (Ti) buffer layer prepared by dip coating was inserted to improve the bonding strength between the HA/gelatin layer and stainless steel substrate. The suspensions, composed of 1 vol% of HA and three different additions of gelatin, were formulated with a focus on rheological properties for codeposition of both phases by electrophoretic deposition (EPD). The composite coatings performed by EPD were investigated in terms of deposition efficiency and kinetics over different deposition times. The EPD process was performed at both ambient temperature and the gelling temperature of the suspension. While at room temperature no electrophoretic growth of the layers was observed, the thermal gelation of gelatin promotes the growth of a homogeneous, well-adherent coating.


2021 ◽  
Author(s):  
Alpeshkumar Macwan

This study is aimed at identifying the change of residual stresses in suspension plasma sprayed (SPS) 8 mol% YSZ electrolytes on top of porous stainless steel substrate with varying processing parameters and temperatures. The residual stresses in the electrolyte layer are tensile with a value of approximately 90 MPa at room temperature. Porosity, microcracks and segmentation cracks are observed to form in the coating during post-deposition cooling. The decrease of residual stresses with increasing temperature is related to the changes in the Young’s modulus, thermal expansion mismatch, micro-defects and possible creeping of porous stainless steel substrate. The coating fabricated using a torch power of 133 kW and stand-off distance of 90 mm exhibits the highest residual stress due to the formation of a denser microstructure and less cracking. Furthermore, the fracture toughness and interface fracture toughness of the SPS YSZ coating at the optimized condition was determined and discussed.


2011 ◽  
Vol 399-401 ◽  
pp. 2004-2007
Author(s):  
Ahmad Mulia Hafizayatullah Amiruddin ◽  
Roslinda Shamsudin ◽  
Azman Jalar ◽  
Muhammad Azmi Abdul Hamid

In this study, brushite (CaHPO4·2H2O) has been coated on a stainless steel substrate using dip-coating technique. This technique offers uniform and crack-free film over entire surface of the substrate and easy to perform. Layer of brushite coated surround the stainless steel is very much affected by the parameters used namely concentration of the coating solution, speed of coating, stirring time etc. Results show that a smooth thin film is obtained when 1.5M of brushite solution is used and stirred at 50 °C for 2 hours. The optimum withdrawal rate used was 1.5 mm s-1. Thickness of the coating obtained was around 51.37 µm which would enable the apatite to growth.


2008 ◽  
Vol 368-372 ◽  
pp. 1397-1400
Author(s):  
Satoshi Kishida ◽  
Dong Ying Ju ◽  
Hong He

A study of a catalyst for NOx reduction used for a diesel engine of cars is done frequently currently. In the recent studies, Ag/Al2O3 catalyst system is considered to be a candidate for practical use. The ceramics molding body (ceramics honeycomb etc.) is used as a border brim of these catalysts usually. However, there is a problem. Strength to thermal shock is low. Moreover, it is not easy to go up in the center part until the catalyst operating temperature because thermal conductivity is bad and is obstructed working of the catalyst to the first stage of the reaction for that. In this research, the Ag/Al2O3 catalyst system was coated to stainless steel (SUS304) substrate that forming it is easy and heat conduction rate is good. The aluminum nitrate was used as a binder. After the binder is dissolved in the ion exchange water, the stainless steel substrate coated Ag/Al2O3 catalyst is sintered. In order to optimize coating conditions, the heating temperature, the sintering time, the density of the binder and the amount of the coating powder addition as well as the dip coating frequency were changed, respectively.


2016 ◽  
Vol 34 (1) ◽  
pp. 266-272 ◽  
Author(s):  
Beom-Seok Seo ◽  
Jae-Yun Han ◽  
Kwan-Young Lee ◽  
Dong-Won Kim ◽  
Shin-Kun Ryi

Sign in / Sign up

Export Citation Format

Share Document