scholarly journals Passivation of chromium disilicide in acidic media

2021 ◽  
Vol 11 (3) ◽  
pp. 202-211
Author(s):  
K. V. Shadrin ◽  
◽  
Viktoria V. Panteleeva ◽  
А. B. Shein ◽  
◽  
...  
Keyword(s):  
Oxide Film ◽  
Chemical Resistance ◽  
Anodic Behavior ◽  
Chromium Oxides ◽  
Acidic Media ◽  
Growth Constant ◽  
High Chemical ◽  
Impedance Measurements ◽  
High Chemical Resistance ◽  
Small Content

The anodic behavior of CrSi2 electrode in 0,5 M H2SO4, 0,5 M HClO4, 0,5 M HNO3 and 0,5 M HCl solutions has been studied by the methods of polarization, capacitance, and impedance measurements. It has been concluded that in the process of anodic oxidation at potentials from corrosion E to transpassivation E inclusive, an oxide film is formed on the surface of chromium disilicide in the studied media, which is close in composition to SiO2 (with a small content of chromium oxides). The presence of this film on the silicide surface determines its high chemical resistance in the studied solutions. The thickness of the oxide film on CrSi2 has been calculated depending on the potential and composition of the electrolyte. The growth constant of the oxide film has been determined.

Effect of Heat Treatment on the Properties of Polyetheretherketone and its Composite

2021 ◽  
Vol 1167 ◽  
pp. 23-33
Author(s):  
Alaa A. Mohammed
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Thermal Stability ◽  
Bioactive Glass ◽  
Glass Powder ◽  
Chemical Resistance ◽  
Positive Influence ◽  
Thermoplastic Polymer ◽  
High Chemical ◽  
High Chemical Resistance

Polyetheretherketone (PEEK) is a semicrystalline thermoplastic polymer with high chemical resistance, thermal stability and excellent mechanical properties. In the present work, neat PEEK and 3% bioactive glass/PEEK composites were annealed at various temperatures (100 °C, 200 °C and 300 °C) for (30 and 60) min and characterized with mechanical and density tests, differential scanning calorimetery and Fourier transform infrared spectroscopy. Results manifested bioactive glass powder enhanced the properties of the PEEK matrix. Thermal annealing at (200 and 300 °C) had a positive influence on the mechanical properties and density owing to increase in the level of crystallinity, whereas annealing at (100 °C) had not effect on the properties.

Self-Sensing Composite Materials With Intelligent Fabrics

2019 ◽  
Author(s):  
Federico Fabriani ◽  
Giulia Lanzara
Keyword(s):  
Composite Materials ◽  
Structural Health Monitoring ◽  
Glass Fiber ◽  
Health Monitoring ◽  
Chemical Resistance ◽  
Piezoelectric Properties ◽  
Low Cost ◽  
High Chemical ◽  
Monitoring Applications ◽  
High Chemical Resistance

Abstract The excellent piezoelectric properties of Polyvinyl Fluoride (PVDF), its low cost, ease of workability and high chemical resistance, make it very useful to develop sensing devices for structural health monitoring applications (SHM). However, challenges occur when the devices need to be embedded into a hosting material or structure which could instead be damaged. In this study, the PVDF device is transformed into an ultralight and porous piezoelectric mat formed by ultra-long and randomly distributed micro fibers. The piezoelectric mat is embedded into a glass fiber (GF) composite by intercalating it with the GF layers during the lay-up process. This approach allows the realization of an intelligent composite that is capable to self-monitor its strain or vibrations during inservice life.

Boron nitride: a promising material for proton exchange membranes for energy applications

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 12755-12773 ◽  
Author(s):  
Vikrant Yadav ◽  
Vaibhav Kulshrestha
Keyword(s):  
Boron Nitride ◽  
Surface Area ◽  
Chemical Resistance ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Large Surface Area ◽  
Promising Material ◽  
High Chemical ◽  
Energy Applications ◽  
High Chemical Resistance

Boron nitride (BN) is an exciting material and has drawn the attention of researchers for the last decade due to its surprising properties, including large surface area, thermomechanical stability, and high chemical resistance.

scholarly journals Tensile and Flexural Properties of Chopped Strand E-glass Fibre Mat Reinforced CNSL-Epoxy Composites.

2018 ◽  
Vol 144 ◽  
pp. 02025 ◽  
Author(s):  
Suhas Yeshwant Nayak ◽  
Srinivas Shenoy Heckadka ◽  
Linto George Thomas ◽  
Anil Baby
Keyword(s):  
Glass Fibre ◽  
Chemical Resistance ◽  
Low Cost ◽  
Flexural Properties ◽  
Micro Hardness ◽  
High Chemical ◽  
Reinforced Plastic ◽  
High Chemical Resistance ◽  
Chopped Strand Mat ◽  
Insulating Properties

Glass fibres have the principal advantages such as high tensile strength, high chemical resistance, low cost, and excellent insulating properties which makes them an important constituent in fibre reinforced plastic and composite industry. In this study, E-glass fibre in the form of Chopped Strand Mat (CSM) with different weight fractions such as 15%, 30%, and 45% were used as reinforcement in CNSL-epoxy resin composites. Fabrication of the composites was done by hand layup technique. Micro-hardness, tensile and flexural properties were investigated for all the composite panels of different compositions. The results clearly indicated an improvement in micro hardness, tensile and flexural properties with the increase in fibre content.

Novel Gap Filling BARC with High Chemical Resistance

2019 ◽  
Author(s):  
Yuto Hashimoto ◽  
Shigetaka Otagiri ◽  
Hiroto Ogata ◽  
Satoshi Kamibayashi ◽  
Takafumi Endo ◽  
...  
Keyword(s):  
Chemical Resistance ◽  
Gap Filling ◽  
High Chemical ◽  
High Chemical Resistance

scholarly journals Novel Gap Filling BARC with High Chemical Resistance

2018 ◽  
Vol 31 (4) ◽  
pp. 547-553
Author(s):  
Yuto Hashimoto ◽  
Shigetaka Otagiri ◽  
Hiroto Ogata ◽  
Satoshi Kamibayashi ◽  
Ryuta Mizuochi ◽  
...  
Keyword(s):  
Chemical Resistance ◽  
Gap Filling ◽  
High Chemical ◽  
High Chemical Resistance
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