Effect of Nanosilica and Boron Carbide on Adhesion Strength of High Temperature Adhesive Based on Phenolic Resin for Graphite Bonding

2014 ◽  
Vol 53 (29) ◽  
pp. 11747-11754 ◽  
Author(s):  
Seyyed Arash Haddadi ◽  
Mohammad Mahdavian-Ahadi ◽  
Farhang Abbasi
Keyword(s):  
High Temperature ◽  
Boron Carbide ◽  
Adhesion Strength ◽  
Phenolic Resin

Effect of B4C and SiO2 on Bond Property for Phenolic Resin-Based Adhesive

2018 ◽  
Vol 281 ◽  
pp. 959-963
Author(s):  
Feng Zhang ◽  
Chuan Qi Hu ◽  
Shi Chao Zhang ◽  
Hao Ran Sun ◽  
Yuan Tian ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Bond Strength ◽  
Boron Carbide ◽  
Bonding Strength ◽  
Heat Treatment Temperature ◽  
Room Temperature ◽  
Phenolic Resin ◽  
Optical Microscope ◽  
Treatment Temperature

In this paper, the modified phenolic resin-based adhesive was prepared by dissolving different components. After low temperature curing, SiC samples were bonded by the binder. The samples were treated at different temperatures (400°C, 800°C, 1200°C, 1500°C) under an inert atmosphere. The bonding strength of samples was tested after heat treatment at room temperature. The results showed that the bonding strength of the B4C modified phenolic resin (PF) based adhesive is the highest. When the heat treatment temperature was above 1200°C, the bond strength increased with the additive amount of boron carbide at room temperature. The microstructures of the samples were observed by optical microscope and scanning electron microscope. The effects of the modified filler and heat treatment temperature on the bonding strength of the phenolic resin based adhesive were investigated. The bonding strength of boron carbide-modified phenolic resin-based binder was tested under high temperature. It was found that the bond strength at high temperature was lower than that at room temperature, and the bond strength decreased with the increase of temperature.

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

2020 ◽  
Vol 22 (4) ◽  
pp. 1031-1046
Author(s):  
X. Canute ◽  
M. C. Majumder
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Boron Carbide ◽  
Wear Behavior ◽  
Base Alloy ◽  
Weight Fraction ◽  
Sliding Velocity ◽  
Wear Properties ◽  
High Temperature Wear ◽  
The Matrix

AbstractThe need for development of high temperature wear resistant composite materials with superior mechanical properties and tribological properties is increasing significantly. The high temperature wear properties of aluminium boron carbide composites was evaluated in this investigation. The effect of load, sliding velocity, temperature and reinforcement percentage on wear rate was determined by the pin heating method using pin heating arrangement. The size and structure of base alloy particles change considerably with an increase of boron carbide particles. The wettability and interface bonding between the matrix and reinforcement enhanced by the addition of potassium flurotitanate. ANOVA technique was used to study the effect of input parameters on wear rate. The investigation reveals that the load had higher significance than sliding velocity, temperature and weight fraction. The pin surface was studied with a high-resolution scanning electron microscope. Regression analysis revealed an extensive association between control parameters and response. The developed composites can be used in the production of automobile parts requiring high wear, frictional and thermal resistance.

scholarly journals Improved high-temperature damping performance of nitrile-butadiene rubber/phenolic resin composites by introducing different hindered amine molecules

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 482-490
Author(s):  
Meng Song ◽  
Xiulin Yue ◽  
Xiujuan Wang ◽  
Mengjie Huang ◽  
Mingxing Ma ◽  
...  
Keyword(s):  
High Temperature ◽  
Phenolic Resin ◽  
Thermomechanical Analysis ◽  
Butadiene Rubber ◽  
Scanning Calorimetry ◽  
Nitrile Butadiene Rubber ◽  
Theoretical Support ◽  
Higher Temperature ◽  
Damping Materials ◽  
Hybrid Damping

AbstractBy introducing hindered amine GW-622 or GW-944 into nitrile-butadiene rubber/phenolic resin (NBR/PR, abbreviated as NBPR) matrix, we have prepared different hindered amine/NBR/PR ternary hybrid damping materials with high-temperature damping performance, respectively. Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), differential scanning calorimetry (DSC), and dynamic thermomechanical analysis (DMA) were used to research the microstructure, compatibility, and damping properties of the hindered amine/NBPR composites. FTIR results indicate that hydrogen bonds are formed between the hindered amine and the NBPR matrix. Both DSC and SEM results show that hindered amine has partial compatibility with the NBPR matrix. DMA results show that two loss peaks appear in the hindered amine/NBPR composite. Thereby, the composites show better damping performance at a higher temperature, and the temperature domain of high-temperature damping becomes wider with the increase in the addition of hindered amine. This study provides a theoretical support for the preparation of high-temperature damping materials.

High temperature ablation of kaolinite layered silicate/phenolic resin/asbestos cloth nanocomposite

2008 ◽  
Vol 150 (1) ◽  
pp. 136-145 ◽  
Author(s):  
Ahmad Reza Bahramian ◽  
Mehrdad Kokabi ◽  
Mohammad Hossein Navid Famili ◽  
Mohammad Hossein Beheshty
Keyword(s):  
High Temperature ◽  
Phenolic Resin ◽  
Layered Silicate

High-temperature strength of boron carbide with Pt grain-boundary framework in situ synthesized during spark plasma sintering

2020 ◽  
Vol 46 (7) ◽  
pp. 9136-9144 ◽  
Author(s):  
O. Vasylkiv ◽  
D. Demirskyi ◽  
H. Borodianska ◽  
A. Kuncser ◽  
P. Badica
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
High Temperature Strength ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Synthesis of Star-Shaped Boron Carbide Micro-Crystallites under High Pressure and High Temperatures

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 448
Author(s):  
Vladimir Filonenko ◽  
Pavel Zinin ◽  
Igor Zibrov ◽  
Alexander Anokhin ◽  
Elena Kukueva ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Boron Carbide ◽  
Carbon Content ◽  
High Temperatures ◽  
Low Carbon

We synthesized star-shaped pentagonal microcrystals of boron carbide with an extremely low carbon content (~5%), from m-carborane under high pressure (7 GPa) and high temperature (1370–1670 K). These crystals have five-fold symmetry and grow in the shape of stars. A 5-fold symmetry in large micron-sized crystals is extremely rare making this a striking observation.

scholarly journals Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Limin Duan ◽  
Yuanhang Zhang ◽  
Jinxing Lai
Keyword(s):  
High Temperature ◽  
Adhesion Strength ◽  
Detrimental Effect ◽  
Ground Temperature ◽  
Geothermal Heat ◽  
Factors Affecting ◽  
Temperature And Humidity ◽  
Geothermal Environments ◽  
Relevant Factors

Long and deep tunnels are increasingly designed and built worldwide, often in severe geothermal environments characterized by high temperature in the rocks. This issue cannot be ignored because high temperature definitely affects the strength of the adhesion between the concrete and the surrounding rocks, whatever the lining cast in place, segmental or sprayed using shotcrete. The causes of geothermal heat and the effect of the temperature on tunnel linings during and after their construction are recalled and discussed in this paper. Both temperature and humidity are shown to be the most relevant factors affecting adhesion strength, whose loss is related to the microdamage in the shotcrete layers closest to the rock. Possible ways to improve adhesion strength and to minimize the high-temperature detrimental effect are also presented and discussed.

scholarly journals Boron carbide composites with highly aligned graphene nanoplatelets: light-weight and efficient electromagnetic interference shielding materials at high temperatures

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39314-39320 ◽  
Author(s):  
Y. Q. Tan ◽  
H. Luo ◽  
X. S. Zhou ◽  
S. M. Peng ◽  
H. B. Zhang
Keyword(s):  
High Temperature ◽  
Boron Carbide ◽  
High Temperatures ◽  
Electromagnetic Interference ◽  
Graphene Nanoplatelets ◽  
Light Weight ◽  
Electromagnetic Interference Shielding ◽  
Shielding Composites

The incorporation of a small amount of highly aligned graphene nanoplatelets into boron carbide leads to light-weight and efficient high-temperature electromagnetic interference shielding composites.

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