A unique method for curing composite materials by introducing vibration treatment into the hybrid heating process

2021 ◽  
Vol 28 (10) ◽  
pp. 2961-2972
Author(s):  
Cheng-long Guan ◽  
Li-hua Zhan ◽  
Guang-ming Dai ◽  
Xin-tong Wu ◽  
Yu Xiao
Keyword(s):  
Composite Materials ◽  
Heating Process ◽  
Vibration Treatment ◽  
Hybrid Heating ◽  
Unique Method

Application of the 50 Ω Radio Frequency Technology in the Automotive Industry: Fast Bonding of Composite Materials: Rear Doors of the Citroen Zx and Citroen Xantia Cars

1996 ◽  
Vol 430 ◽  
Author(s):  
J. P. Bernard ◽  
Mr. Sabran ◽  
L. Collet
Keyword(s):  
Composite Materials ◽  
Radio Frequency ◽  
Automotive Industry ◽  
Heat Insulation ◽  
Industrial Process ◽  
Heating Process ◽  
Production Lines ◽  
Fast Heating ◽  
Convection Heating ◽  
Short Time

AbstractIn the field of plastic and composite materials the radio frequency dielectric heating is more and more used. Compared to traditional techniques such as conduction and convection heating, the radio frequency technology is interesting, because it allows fast heating of thick materials and heat insulation materials.As bonding techniques are more and more integrated in production lines, the polymerization of glues must be realized in a very short time. The 50 use of the Ω radio frequency technology makes this heating process possible.The authors describe the industrial application of this technology to the CITROEN ZX and CITROEN XANTIA cars. Steps involved in implementing this industrial process (laboratory - pilot -industrial equipment) are presented and analysis the technical and economic results of this application.

scholarly journals Preparation of Degradable Superhydrophobic Mg/P/Z/F/H Composite Materials and Their Anticorrosion

2021 ◽  
Author(s):  
Zhongxian Xi ◽  
Chengqing Yuan ◽  
Xiuqin Bai ◽  
Chun Wang ◽  
Anne Neville
Keyword(s):  
Corrosion Resistance ◽  
Composite Materials ◽  
Magnesium Alloys ◽  
The Self ◽  
Heating Process ◽  
Good Adhesion ◽  
Step Method ◽  
One Step ◽  
Self Cleaning ◽  
Poly Caprolactone

In this study, the degradable superhydrophobic Mg/P/Z/F/H (magnesi-um/poly(-caprolactone)/zinc oxide/1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES)/ heating process) composite materials were prepared through one-step method for enhancing the corrosion resistance of AZ91D magnesium alloys. Electrochemical measurements showed that Mg/P/Z/F/H materials significantly improved the corrosion resistance of magnesium alloys in 3.5 wt.% NaCl. The self-cleaning, adhesion and stability tests suggested that Mg/P/Z/F/H composite materials had well self-cleaning properties, good adhesion strength and stability in wet atmosphere.

Preliminary Metallurgical and Mechanical Investigations of Microwave Processed Hastelloy Joints

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Satnam Singh ◽  
Rajveer Singh ◽  
Dheeraj Gupta ◽  
Vivek Jain
Keyword(s):  
Xrd Analysis ◽  
Tensile Tests ◽  
Heating Process ◽  
Carbide Formation ◽  
Metallic Materials ◽  
Volumetric Heating ◽  
Hybrid Heating ◽  
Microwave Hybrid Heating ◽  
Vicker’S Microhardness ◽  
Equiaxed Grains

In this paper, joining of Hastelloy has been successfully carried out by microwave hybrid heating process. The joints were developed by using a microwave oven at a frequency of 2.45 GHz and 900 W. A thin layer of slurry consisting of nickel-based powder and epoxy resin was introduced between the faying surfaces. The joints obtained by microwave hybrid heating were characterized by XRD, SEM–EDS, Vicker's microhardness, and tensile tests. Microstructure analysis revealed the formation of equiaxed grains, and results of XRD analysis revealed formation of some intermetallics and suppression of carbide formation. This can be attributed to the volumetric heating nature of microwaves. The microhardness study revealed 320 ± 25 HV hardness on grain surfaces and 680 ± 40 HV on grain boundaries. The tensile strength of the microwave processed joints was∼82% of base Hastelloy strength. The fractographic analysis of the fractured samples revealed a ductile fracture coupled with the shearing of brittle carbides in the joint region. An overall study revealed the potential of microwaves in joining of bulk metallic materials.

A Novel Hybrid Heating Method for Elevated Temperature Mechanical Testing of Miniature Specimens

2016 ◽  
Author(s):  
Lin Li ◽  
Gracious Ngaile ◽  
Tasnim Hassan
Keyword(s):  
Elevated Temperature ◽  
Elevated Temperatures ◽  
Heating Process ◽  
Electric Resistance ◽  
Heating Method ◽  
Hybrid Heating ◽  
Testing Technology ◽  
Heating Coils ◽  
Highly Uniform ◽  
Material Tests

The lack of robust testing systems to generate uniform elevated temperatures on specimens in material tests is hindering the advancement of small specimen testing technology (SSTT). The purpose of this study is to develop a novel hybrid heating method combining coil heating and electric-resistance specimen heating to uniformly heat micro specimens in material tests. In a hybrid heating process, two heating coils are used to heat the local temperatures on the specimen ends, and electric current is conducted through the specimen to generate Joule heat and compensate the heat transfer effects of natural convection and radiation around the specimen center area. In this way, a highly uniform temperature distribution can be generated on the specimen between the heating coils. In this study, Thermal-Electrical and Transient Thermal FEA simulations are applied to analyze the temperature distributions and preheating times on the micro specimens under coil heating, electric-resistance specimen heating, and hybrid heating respectively. According to the simulation results, it can be concluded that hybrid heating method can provide the ability to generate highly uniform elevated temperature conditions on different micro tubular specimens with short preheating times.

scholarly journals Preparation of Degradable Superhydrophobic Mg/P/Z/F/H Composite Materials and Their Anticorrosion

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1239
Author(s):  
Zhongxian Xi ◽  
Chengqing Yuan ◽  
Xiuqin Bai ◽  
Chun Wang ◽  
Anne Neville
Keyword(s):  
Zinc Oxide ◽  
Corrosion Resistance ◽  
Composite Materials ◽  
Magnesium Alloys ◽  
Dip Coating ◽  
Heating Process ◽  
Good Adhesion ◽  
Coating Method ◽  
Dip Coating Method ◽  
Poly Caprolactone

In this study, the degradable superhydrophobic Mg/P/Z/F/H (magnesium/poly(-caprolactone)/zinc oxide/1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES)/heating process) composite materials were prepared through dip-coating method and heating process, for enhancing the corrosion resistance of the AZ91D magnesium alloys. The electrochemical measurements revealed that the Mg/P/Z/F/H materials significantly improved the corrosion resistance of the magnesium alloys in 3.5 wt.% NaCl. The Mg/P/Z/F/H composite materials exhibited efficient self-cleaning properties, good adhesion strength, and stability in wet atmosphere.

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Transmission electron microscopy of composite materials

1988 ◽  
Vol 46 ◽  
pp. 1012-1015
Author(s):  
K.P.D. Lagerlof
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Structural Defects ◽  
Structural Composites ◽  
Multiphase Materials ◽  
Structural Reinforcement ◽  
Transmission Electron ◽  
Reinforced Fiber ◽  
Particulate Reinforced Composites ◽  
Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

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