scholarly journals Optimizing the Microstructure and Corrosion Resistance of BDD Coating to Improve the Service Life of Ti/BDD Coated Electrode

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3188 ◽  
Author(s):  
Xin ru Lu ◽  
Ming hui Ding ◽  
Lu Zhang ◽  
Zhi liang Yang ◽  
Yao Lu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Chemical Vapor ◽  
Structural Defects ◽  
Electrolysis Condition ◽  
Factors Affecting ◽  
Plasma Chemical Vapor Deposition ◽  
Coated Electrode ◽  
Short Service Life ◽  
Coated Electrodes

The short service life of the Ti/BDD coated electrode is the main reason that limits its practical use. In this paper, the effect of structural change on the service life was studied using Ti/BDD coated electrodes prepared with the arc plasma chemical vapor deposition (CVD) method. It was found that the microstructural defects and corrosion resistance of BDD coatings were the main factors affecting the electrode service life. By optimizing the process parameters in different deposition stages, reducing the structural defects and improving the corrosion resistance of the BDD coating were conducted successfully, which increased the service life of the Ti/BDD coated electrodes significantly. The lifetime of the Ti/BDD samples increased from 360 h to 655 h under the electrolysis condition with a current density of 0.5 A/cm2, with an increase of 82%.

scholarly journals Corrosion resistance of non-stoichiometric gadolinium zirconate fabricated by laser-enhanced chemical vapor deposition

2021 ◽  
Vol 10 (3) ◽  
pp. 520-528
Author(s):  
Chengguan Zhang ◽  
Yun Fan ◽  
Juanli Zhao ◽  
Guang Yang ◽  
Hongfei Chen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Chemical Vapor Deposition ◽  
Service Life ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Gadolinium Zirconate ◽  
Barrier Coating ◽  
Micro Cracks ◽  
Calcium Magnesium ◽  
Alumino Silicate

AbstractGadolinium zirconate (GZ) is a promising candidate for next-generation thermal barrier coating (TBC) materials. Its corrosion resistance against calcium-magnesium-alumino-silicate (CMAS) needs to be further increased for enhancing its in-service life. As the Gd element plays an important role in the CMAS resistance, three GZ coatings (GZ-0.75, GZ-1.0, and GZ-1.2) with different Gd/Zr atomic ratios are designed and deposited by laser enhanced chemical vapor deposition (LCVD) in this work. It is found that the generated Gd-apatite in GZ-1.2 would block micro-cracks inside the column structure and the inter-columnar gap more efficiently. Thus, the CMAS penetration rate (5.2 μm/h) of GZ-1.2 decreases over 27% comparing with GZ-1.0 and GZ-0.75, which is even lower than the Gd2Zr2O7 coatings fabricated by electron-beam physical vapor depositions (EB-PVDs). This work provides a feasible way to adjust the coating’s corrosion resistance and may guide the development of future coating for long in-service life.

scholarly journals Study of New Type Clamp Made of Epoxy Vinyl Resin on Standing Pipe under Sea

2017 ◽  
Vol 26 (6) ◽  
pp. 096369351702600
Author(s):  
B. Zhang ◽  
Z. Wang ◽  
T. Wang ◽  
D.H. Wang
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Equivalent Stress ◽  
Impact Resistance ◽  
Wave Load ◽  
Short Service Life ◽  
The Matrix ◽  
Maximum Equivalent Stress ◽  
New Type ◽  
Design Requirements

The disadvantages of the traditional steel clamp include installation difficulty, a short service life. Therefore, a non-metallic clamp was designed to relieve these issues. MFE711 bisphenol-A epoxy vinyl resin was identified as the matrix materials needed to meet the requirements of corrosion resistance, impact resistance and other performances. After analyzing the wave load on the clamp, the resultant force on the cable protection pipe is 78784N, and its maximum equivalent stress is 73.78 MPa. This is less than the value of 155 MPa of yield strength on the clamp; therefore it meets the predetermined design requirements. Presently, there are 11 Clamp products that have been installed on the standing pipe under the offshore platform and will apply widely to engineering.

Preparation of Magnesia Stabilized Zirconia Thin Films for Solid Oxide Fuel Cell by Microwave Plasma Chemical Vapor Deposition.

Shinku ◽  
1997 ◽  
Vol 40 (8) ◽  
pp. 660-663
Author(s):  
Hideo OKAYAMA ◽  
Tsukasa KUBO ◽  
Noritaka MOCHIZUKI ◽  
Akiyoshi NAGATA ◽  
Hiromu ISA
Keyword(s):  
Thin Films ◽  
Fuel Cell ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Stabilized Zirconia ◽  
Plasma Chemical ◽  
Plasma Chemical Vapor Deposition

BRUSH PHOSPHOR BRONZE

Alloy Digest ◽  
1986 ◽  
Vol 35 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Thermally Treated

Abstract BRUSH PHOSPHOR BRONZE is precision rolled and thermally treated to produce a material with consistent formability and properties. The product offers design advantages, improved service life and reduced fabrication problems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: Cu-516. Producer or source: Brush Wellman Inc..

AW-TEN

Alloy Digest ◽  
1966 ◽  
Vol 15 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Service Life ◽  
Yield Strength ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Steel Company ◽  
Superior Corrosion Resistance ◽  
Minimum Yield

Abstract AW-TEN is a high-strength structural steel offering 50,000 psi minimum yield strength, good formability and weldability, and superior corrosion resistance. It is intended primarily for weight reduction and longer service life. It is recommended for automobile and truck bodies, buildings, bridges, railway cars, booms, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and bend strength as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-199. Producer or source: Alan Wood Steel Company.

Pitting Corrosion of Biomedical Titanium and Titanium Alloys: A Brief Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Yu-Wei Cui ◽  
Liang-Yu Chen ◽  
Xin-Xin Liu
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Potential Temperature ◽  
Growth Stages ◽  
Factors Affecting ◽  
Ti Alloys ◽  
Pitting Corrosion Resistance ◽  
Superior Mechanical Properties ◽  
Good Biocompatibility ◽  
Main Factors

Abstract:: Thanks to their excellent corrosion resistance, superior mechanical properties and good biocompatibility, titanium (Ti) and Ti alloys are extensively applied in biomedical fields. Pitting corrosion is a critical consideration for the reliability of Ti and Ti alloys used in the human body. Therefore, this article focuses on the pitting corrosion of Ti and Ti alloys, which introduces the growth stages of pitting corrosion and its main influencing factors. Three stages, i.e. (1) breakdown of passive film, (1) metastable pitting, and (3) propagation of pitting, are roughly divided to introduce the pitting corrosion. As reviewed, corrosive environment, applied potential, temperature and alloy compositions are the main factors affecting the pitting corrosion of Ti and Ti alloys. Moreover, the pitting corrosion of different types Ti alloys are also reviewed to correlate the types of Ti alloys and the main factors of pitting corrosion. Roughly speaking, β-type Ti alloys have the best pitting corrosion resistance among the three types of Ti alloys.

scholarly journals Deposition of Boron-Doped Thin CVD Diamond Films from Methane-Triethyl Borate-Hydrogen Gas Mixture

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 666 ◽  
Author(s):  
Nikolay Ivanovich Polushin ◽  
Alexander Ivanovich Laptev ◽  
Boris Vladimirovich Spitsyn ◽  
Alexander Evgenievich Alexenko ◽  
Alexander Mihailovich Polyansky ◽  
...  
Keyword(s):  
Film Growth ◽  
Chemical Vapor ◽  
Hydrogen Gas ◽  
Diamond Growth ◽  
Structural Defects ◽  
Boron Doped Diamond ◽  
Diamond Deposition ◽  
Synthesis Conditions ◽  
Surface Etching ◽  
Boron Doped

Boron-doped diamond is a promising semiconductor material that can be used as a sensor and in power electronics. Currently, researchers have obtained thin boron-doped diamond layers due to low film growth rates (2–10 μm/h), with polycrystalline diamond growth on the front and edge planes of thicker crystals, inhomogeneous properties in the growing crystal’s volume, and the presence of different structural defects. One way to reduce structural imperfection is the specification of optimal synthesis conditions, as well as surface etching, to remove diamond polycrystals. Etching can be carried out using various gas compositions, but this operation is conducted with the interruption of the diamond deposition process; therefore, inhomogeneity in the diamond structure appears. The solution to this problem is etching in the process of diamond deposition. To realize this in the present work, we used triethyl borate as a boron-containing substance in the process of boron-doped diamond chemical vapor deposition. Due to the oxygen atoms in the triethyl borate molecule, it became possible to carry out an experiment on simultaneous boron-doped diamond deposition and growing surface etching without the requirement of process interruption for other operations. As a result of the experiments, we obtain highly boron-doped monocrystalline diamond layers with a thickness of about 8 μm and a boron content of 2.9%. Defects in the form of diamond polycrystals were not detected on the surface and around the periphery of the plate.

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