scholarly journals Sand Erosion of Polyurethane Coating Materials for CFRP at Elevated Temperature

2021 ◽  
Vol 70 (12) ◽  
pp. 896-903
Author(s):  
Hidechika KARASAWA ◽  
Hiroki SHIBASAKI ◽  
Go ITOHIYA ◽  
Shinichiro YAMASHITA ◽  
Kazuyoshi ARAI
Keyword(s):  
Elevated Temperature ◽  
Polyurethane Coating ◽  
Coating Materials ◽  
Sand Erosion

Preparation of novel marine antifouling polyurethane coating materials

2018 ◽  
Vol 75 (11) ◽  
pp. 5143-5162 ◽  
Author(s):  
Baoli Ou ◽  
Meilong Chen ◽  
Yuanjun Guo ◽  
Yonghai Kang ◽  
Yan Guo ◽  
...  
Keyword(s):  
Polyurethane Coating ◽  
Coating Materials ◽  
Marine Antifouling

Preparation and properties of waterborne-polyurethane coating materials containing conductive polyaniline

2004 ◽  
Vol 12 (3) ◽  
pp. 303-310 ◽  
Author(s):  
Ji-Yun Kwon ◽  
Eun-Young Kim ◽  
Han-Do Kim
Keyword(s):  
Waterborne Polyurethane ◽  
Polyurethane Coating ◽  
Coating Materials ◽  
Conductive Polyaniline

scholarly journals Development of surface coating for underwater concrete structures

2018 ◽  
Vol 7 (1.9) ◽  
pp. 189
Author(s):  
S Sharmila ◽  
P Keerthana
Keyword(s):  
Abrasion Resistance ◽  
Surface Coating ◽  
High Performance ◽  
Coal Tar ◽  
Research Work ◽  
Concrete Structures ◽  
Protective Film ◽  
Polyurethane Coating ◽  
Coating Materials ◽  
Underwater Concrete

Surface coating is the most focused research problem in the construction sites to repair the deteriorated concrete. Surface coating is an most necessary process to be performed in concrete to avoid the issues such as aesthetics, sealing, chemical resistance or abrasion resistance. These coatings are termed as special resins with proper compositions of materials which can prevent the transmission of water and contaminants while at the same time keeping the structure safe. This research work focuses on preparation of surface and the protective surface coating to protect the concrete. High performance coal tar with polyurethane coating materials are used to protect concrete from chemical and mechanical attack in interior, exterior and marine environments. Coal tar with polyurethane coating systems consist of two or more components blended and applied as a film, reacted chemically to form a protective film of high integrity, excellent adhesion, toughness and impact resistance. The coating were applied on 4”x4”x4” concrete cubes and kept for one week curing the samples, thickness of the coating were ~70±5μm measured using hegman gauge. The tests such as Abrasion resistance, pull off test, water absorption test, chloride resistance test and Rapid chloride penetration testwere performed and the results exemplifies that  coal tar mixed with polyurethane coating can be used for underwater concrete structures.

Degradation of polyurethane coating materials from liquefied wheat straw for controlled release fertilizers

2016 ◽  
Vol 133 (41) ◽  
Author(s):  
Panfang Lu ◽  
Yanfei Zhang ◽  
Cong Jia ◽  
Yufeng Li ◽  
Min Zhang ◽  
...  
Keyword(s):  
Controlled Release ◽  
Wheat Straw ◽  
Polyurethane Coating ◽  
Coating Materials ◽  
Controlled Release Fertilizers

Evidence for a shear mechanism for the precipitation of γ-zirconium hydride in zirconium

1978 ◽  
Vol 36 (1) ◽  
pp. 658-659
Author(s):  
G.J.C. Carpenter
Keyword(s):  
Elevated Temperature ◽  
Strain Field ◽  
Zirconium Hydride ◽  
Zirconium Atom ◽  
Atom Diffusion ◽  
Solvus Temperature ◽  
Hexagonal Close Packed ◽  
Partial Dislocations ◽  
The Face

In zirconium-hydrogen alloys, rapid cooling from an elevated temperature causes precipitation of the face-centred tetragonal (fct) phase, γZrH, in the form of needles, parallel to the close-packed <1120>zr directions (1). With low hydrogen concentrations, the hydride solvus is sufficiently low that zirconium atom diffusion cannot occur. For example, with 6 μg/g hydrogen, the solvus temperature is approximately 370 K (2), at which only the hydrogen diffuses readily. Shears are therefore necessary to produce the crystallographic transformation from hexagonal close-packed (hep) zirconium to fct hydride.The simplest mechanism for the transformation is the passage of Shockley partial dislocations having Burgers vectors (b) of the type 1/3<0110> on every second (0001)Zr plane. If the partial dislocations are in the form of loops with the same b, the crosssection of a hydride precipitate will be as shown in fig.1. A consequence of this type of transformation is that a cumulative shear, S, is produced that leads to a strain field in the surrounding zirconium matrix, as illustrated in fig.2a.

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

Polyurethane coating in the prevention of nickel dermatitis

1971 ◽  
Vol 103 (1) ◽  
pp. 58-60
Author(s):  
J. C. Moseley
Keyword(s):  
Polyurethane Coating

Biocompatible polyurethane coating for use in pulsatile ventricular asist dvices

2012 ◽  
Vol 60 (S 01) ◽  
Author(s):  
D Wehner ◽  
K Stadtherr ◽  
K Beckenlehner-Lukas ◽  
A Gessner ◽  
C Schmid ◽  
...  
Keyword(s):  
Polyurethane Coating

Growth and Physiological Characteristics of Abies koreana, Pinus densiflora, Quercus serrata Seedlings under Elevated Temperature and CO2 Concentration

2020 ◽  
Vol 11 (1) ◽  
pp. 1-9
Author(s):  
Woo Kyung Song ◽  
Go Eun Park ◽  
Sun Mi Je ◽  
Sun Hee Kim ◽  
Jong-Hwan Lim
Keyword(s):  
Elevated Temperature ◽  
Pinus Densiflora ◽  
Co2 Concentration ◽  
Quercus Serrata ◽  
Physiological Characteristics ◽  
Abies Koreana
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