scholarly journals Electro-chemical Corrosion of a Cast Iron Protected with a Al2O3 Ceramic Layer

2019 ◽  
Vol 69 (12) ◽  
pp. 3586-3589 ◽  
Author(s):  
Costica Bejinariu ◽  
Corneliu Munteanu ◽  
Costel Dorel Florea ◽  
Bogdan Istrate ◽  
Nicanor Cimpoesu ◽  
...  
Keyword(s):  
Cast Iron ◽  
Electrolyte Solution ◽  
Metallic Substrate ◽  
Thin Layers ◽  
Ceramic Layer ◽  
Material Surface ◽  
Chemical Corrosion ◽  
Al2o3 Ceramic ◽  
Micro Cracks ◽  
Iron Material

Thin layers of Al2O3 were used to protect a standard FC250 cast iron at electro-corrosion in acid rain electrolyte solution. In comparison with a cast-iron material we present the results obtained on the metallic covered sample using linear and cyclic potentiometry. The material surface was investigated using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques. The results present a generalized corrosion with a higher resistance for covered samples (more than 30 times) in comparison with the simple cast iron. The main causes of the corrosion of the covered samples are based on the thin ceramic layer imperfections like pores or micro-cracks that facilitate the contact of the electrolyte solution with the metallic substrate.

scholarly journals Corrosion Resistance of a Cast-Iron Material Coated With a Ceramic Layer Using Thermal Spray Method

2018 ◽  
Vol 374 ◽  
pp. 012028
Author(s):  
C D Florea ◽  
C Bejinariu ◽  
C Munteanu ◽  
B Istrate ◽  
S L Toma ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Thermal Spray ◽  
Ceramic Layer ◽  
Spray Method ◽  
Iron Material

Chromium Addition Effect on Wear Properties of Cast-Iron Material

2015 ◽  
Vol 809-810 ◽  
pp. 572-577
Author(s):  
Costel Florea ◽  
Costică Bejinariu ◽  
Viorel Paleu ◽  
Daniela Chicet ◽  
Ioan Carcea ◽  
...  
Keyword(s):  
Cast Iron ◽  
Friction Coefficient ◽  
Point Of View ◽  
Material Surface ◽  
Wear Properties ◽  
Experimental Conditions ◽  
Disk Brake ◽  
Friction Regime ◽  
New Material ◽  
Iron Material

A new cast iron material with a higher Cr content than usual is analyzed by chemical, micro-structural and friction coefficient point of view. The material was obtained by classical melting and the results compared with the experimental results obtained from a standard cast-iron used for applicative disk brake. Four different mechanical solicitation rates were used on the same material surface and the same load. The solicitation regime can be considered as semi-liquid and similar to a raining day experimental conditions. In this paper no thermal considerations were present or discussed. The results present a bigger friction coefficient of the new material and further considerations are necessary for example in a different friction regime.

scholarly journals The Effect of Water Concentration in Ethyl Alcohol on the Environmentally Assisted Embrittlement of Austempered Ductile Irons

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 94
Author(s):  
Petar Janjatovic ◽  
Olivera Eric Cekic ◽  
Leposava Sidjanin ◽  
Sebastian Balos ◽  
Miroslav Dramicanin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Ultimate Tensile Strength ◽  
Ethyl Alcohol ◽  
Water Concentration ◽  
Different Types ◽  
Influence Of Water ◽  
Iron Material ◽  
Proof Strength

Austempered ductile iron (ADI) is an advanced cast iron material that has a broad field of application and, among others, it is used in contact and for conveyance of fluids. However, it is noticed that in contact with some fluids, especially water, ADI material becomes brittle. The most significant decrease is established for the elongation. However, the influence of water and the cause of this phenomenon is still not fully understood. For that reason, in this paper, the influence of different water concentrations in ethyl alcohol on the mechanical properties of ADI materials was studied. The test was performed on two different types of ADI materials in 0.2, 4, 10, and 100 vol.% water concentration environments, and in dry condition. It was found that even the smallest concentration of water (0.2 vol.%) causes formation of the embrittled zone at fracture surface. However, not all mechanical properties were affected equally and not all water concentrations have been critical. The highest deterioration was established in the elongation, followed by the ultimate tensile strength, while the proof strength was affected least.

scholarly journals Numerical Simulation and Experimental Investigation of Laser Ablation of Al2O3 Ceramic Coating

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5502
Author(s):  
Shuang Liu ◽  
Zongjun Tian ◽  
Lida Shen ◽  
Mingbo Qiu
Keyword(s):  
Laser Ablation ◽  
Solid Mechanics ◽  
Ceramic Coating ◽  
Element Model ◽  
Laser Damage ◽  
Damage Analysis ◽  
Mechanism Analysis ◽  
Continuous Irradiation ◽  
Al2o3 Ceramic ◽  
Micro Cracks

This paper presents an evaluation of the molten pool laser damage done to an Al2O3 ceramic coating. Mechanism analysis of the laser damage allowed for a 2D finite element model of laser ablation of the Al2O3 ceramic coating to be built. It consisted of heat transfer, laminar flow, and a solid mechanics module with the level set method. Results showed that the laser damage mechanisms through laser ablation were melting, gasification, spattering, and micro-cracking. The ablation depth and diameter increased with the increasing laser ablation time under continuous irradiation. The simulation profile was consistent with the experimental one. Additionally, the stress produced by the laser ablation was 3500–9000 MPa, which exceeded the tensile stress (350–500 MPa), and fracturing and micro-cracks occurred. Laser damage analysis was performed via COMSOL Multiphysics to predict laser damage morphology, and validate the 3D surface profiler and scanning electron microscope results.

Friction and wear behavior of TaC ceramic layer formed in-situ on the gray cast iron

2019 ◽  
Vol 135 ◽  
pp. 181-188 ◽  
Author(s):  
Nana Zhao ◽  
Yurong Zhao ◽  
Yiqi Wei ◽  
Xin Wang ◽  
Jie Li ◽  
...  
Keyword(s):  
Cast Iron ◽  
Friction And Wear ◽  
Gray Cast Iron ◽  
Wear Behavior ◽  
Ceramic Layer ◽  
Gray Cast ◽  
Friction And Wear Behavior

The Depositional Laser Cladding with Fiber Laser

2009 ◽  
Vol 628-629 ◽  
pp. 447-452
Author(s):  
Peng Fei Lv ◽  
Ji Min Chen ◽  
F.R. Liu
Keyword(s):  
Particle Size ◽  
Laser Cladding ◽  
Surface Engineering ◽  
Laser Energy ◽  
Thin Layers ◽  
Material Surface ◽  
New Approach ◽  
Mean Particle Size ◽  
Cladding Layer

Laser cladding has been developed as a useful technology to modify material surface in industry. In this paper a new approach of surface modification is introduced. Depositional Laser Cladding (DLC) was developed and the different mechanisms were investigated during the manufacture. Basing on particular analysis of defects in the experiment, the relation between the quality of cladding layer and laser energy density is manifested. Depositional effect and thermal effect play their roles in different place and the depositional effect provides thin layers with the thickness of near mean particle size. Appropriate parameters of laser energy can promote high quality, avoiding pores and stacks in agglomeration and ebullition. Controllable low thickness near mean particle size and sharp edge make it possible to be used on producing certain shape in the surface engineering field, such as restoring and gradient materials.

Informatics Challenges in Tissue Engineering and Biomaterials

2003 ◽  
Vol 17 (1) ◽  
pp. 49-54 ◽  
Author(s):  
D. Rekow
Keyword(s):  
Tissue Engineering ◽  
Clinical Performance ◽  
Three Dimensional ◽  
Thin Layers ◽  
Material Surface ◽  
Dental Restorations ◽  
Scaffold Materials ◽  
Ceramic Crowns ◽  
Three Dimensional Configuration

Both tissue engineering and biomaterials have made tremendous strides recently, yet major questions remain unanswered. Tissue-engineered products have come to the market; others are in development. A fundamental issue that informatics could address for tissue engineering is to describe and to predict the cascade of biochemical and cellular reactions that occur as a function of time and implant material: surface texture, microporosity; pore size, density, and connectivity; and three-dimensional configuration. Behavior of ceramics, a subset of tissue-engineering scaffold materials and a mainstay of dental restorations, has been studied extensively for very thin layers and for thicknesses greater than 2 mm. Until recently, little has been known about dentally relevant thickness of 1–2 mm. Results have been surprising and are continuing to develop. Still, at least one fundamental question remains that could be addressed by informatics techniques: Where, along the spectrum of flat-polished material to 10-year clinical in vivo study, can we test to predict clinical performance of all-ceramic crowns accurately?

Growth Kinetics of In Situ Preparation of Dense TiC Ceramic Layer-Reinforced Gray Cast Iron Matrix Surface Composites

2015 ◽  
Vol 17 (11) ◽  
pp. 1562-1567 ◽  
Author(s):  
Shaozhong Fan ◽  
Lisheng Zhong ◽  
Yunhua Xu ◽  
Yonghong Fu ◽  
Liangliang Wang
Keyword(s):  
Cast Iron ◽  
Growth Kinetics ◽  
Gray Cast Iron ◽  
Ceramic Layer ◽  
Iron Matrix ◽  
In Situ Preparation ◽  
Surface Composites ◽  
Matrix Surface ◽  
Kinetics Of
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