Development of Ag–TiO[sub 2] (anatase) Particle Composite Coating Film for Photocatalyst and Effect of the Matrix Metal

2006 ◽  
Vol 153 (6) ◽  
pp. C449 ◽  
Author(s):  
Koichi Ui ◽  
Tomohiro Fujita ◽  
Nobuyuki Koura ◽  
Fumio Yamaguchi
Keyword(s):  
Composite Coating ◽  
Coating Film ◽  
Matrix Metal ◽  
Particle Composite ◽  
Anatase Particle ◽  
The Matrix

Effect of pouring temperature on A356-TiB2 MMCs cast in sand and permanent moulds by in-situ method

2016 ◽  
Vol 25 (5-6) ◽  
pp. 165-169
Author(s):  
C. Rajaravi ◽  
P.R. Lakshminarayanan
Keyword(s):  
Evaluation Studies ◽  
Physical And Mechanical Properties ◽  
Xrd Analysis ◽  
Matrix Composites ◽  
Structure Property ◽  
Pouring Temperature ◽  
Matrix Metal ◽  
Property Evaluation ◽  
The Matrix

AbstractThe paper describes a different condition of pouring temperature by sand and permanent mould to produce A356-6 wt% TiB2 metal matrix composites by in-situ method salt metal reaction route. The observation of SEM micrographs shows particle distribution of the TiB2 and it appears in hexagonal shape in Al matrix. The results of X-ray diffraction (XRD) analysis confirmed the formation of those TiB2 particulates and the results showed TiB2 particles are homogeneously dispersed throughout the matrix metal. Subsequent structure-property evaluation studies indicated sub-micron size reinforcement of in-situ formed TiB2 particles with improved physical and mechanical properties as compared to sand and permanent mould of Al-TiB2 composites. From, the permanent mould Al-TiB2 composite has an advantage of increase the properties over sand mould Al-TiB2 composite.

Wear Resistant Surface Composite Produced by Ultrasonic-Assisted Argon-Arc Clad Injecting Ti(C, N)

2014 ◽  
Vol 1023 ◽  
pp. 7-10
Author(s):  
Ning Zhang ◽  
Shu Chen Wang ◽  
Xu Jiang ◽  
Shen Liang Qu ◽  
Hao Chen
Keyword(s):  
Composite Coating ◽  
Steel Plate ◽  
High Strength ◽  
High Wear Resistance ◽  
Wear Volume ◽  
Injection Device ◽  
The Matrix ◽  
Ultrasonic Assisted ◽  
Powder Particles ◽  
Injection Technology

This experiment was on the basis of the argon-arc clad injection technology, Ni60 self-fluxed alloy powder was coated on the surface of Q235 steel plate, then TiC, TiN, MoC and Co powder were sprayed by the modificated injection device, and at the same time the powder was vibrated by the ultrasonic-assisted vibration device self-designed. So the sprayed powder particles were smaller, shape was more regular, and distribution more uniform. The results show that the microhardness of composite coating was more than 5 times than that of the matrix, and the wear volume was about 1/5 than the matrix. The good combination, high strength and high wear resistance composite coating was obtained.

Fabrication of Apatite/Titanium Functionally Graded Coating Using Supersonic Free-Jet PVD

2009 ◽  
Vol 631-632 ◽  
pp. 187-192
Author(s):  
Atsushi Yumoto ◽  
Takahisa Yamamoto ◽  
Ichiro Shiota ◽  
Naotake Niwa
Keyword(s):  
Composite Coating ◽  
Gas Flow ◽  
Supersonic Nozzle ◽  
In Vitro Study ◽  
Functionally Graded ◽  
Inert Gas ◽  
Coating Film ◽  
Evaporation Chamber ◽  
Free Jet

Hydroxyapatite (HAp) is very attractive in medical field. The objective of this study is to produce HAp/Ti composite coating with Supersonic Free-Jet PVD (SFJ-PVD). The SFJ-PVD is a technique to deposit nanoparticles with supersonic gas flow and to form a thick coating film. In a gas evaporation chamber, a source material is evaporated to form nanoparticles in an inert gas atmosphere. The nanoparticles are then carried to a substrate in a deposition chamber with an inert gas flow through a transfer pipe. The gas flow is generated by the pressure difference between the chambers and accelerated to the supersonic flow of 4.2 Mach through a specially designed supersonic nozzle. With SFJ-PVD, we obtain a uniform high-density HAp/Ti composite coating. XRD analysis reveals that the composite coating is composed of Ti and HAp. An in-vitro study was carried out to investigate the bioactivity of the HAp/Ti composite coating under simulated body fluid.

Preparation and Wear Properties of (Al3Zr+ZrB2)P/2124 Composites Material with In Situ Process

2012 ◽  
Vol 616-618 ◽  
pp. 1736-1740
Author(s):  
Lei Jiao ◽  
Yu Tao Zhao ◽  
Zhong Zhong Zhang ◽  
Yan Wei Yang ◽  
Ming Rui Zhang
Keyword(s):  
Magnetic Field ◽  
Composite Materials ◽  
Sliding Friction ◽  
Testing Machine ◽  
Test Methods ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Matrix Metal ◽  
The Matrix

With pulse magnetic field, it is use 2124-K2ZrF6-KBF4 as matrix metal to produce chemical reaction to gain (Al3Zr+ZrB2) p/2124 composite materials in this paper. In this paper, For the sake of researching the microstructure, the morphology, the size and the matrix distribution characteristics of the reinforced grain of prepared composite material , those test methods are used, such as optical microscopy, scanning electron microscope, X-ray diffraction analysis and so on. We will research the magnetic field strength how to influence size and distribution of Al3Zr +ZrB2 particle and the abrasion performance of (Al3Zr+ZrB2)P/2124 composite materials in the room temperature. Wear experiment is proceeding in the CETR UMT 3-V the testing machine and sliding friction is friction way with pin-disc but without lubricant, then analyzes the wear mechanism.

Al2O3-TiC/Fe Functionally Gradient Material Prepared by SHS Casting

2011 ◽  
Vol 704-705 ◽  
pp. 6-10
Author(s):  
Wan Hong Zang ◽  
Chang Lun Yuan ◽  
Yan Li
Keyword(s):  
Gradient Material ◽  
Matrix Metal ◽  
Exterior Surface ◽  
Gradient Distribution ◽  
Functionally Gradient Material ◽  
Surface Composite ◽  
Functionally Gradient ◽  
High Temperature Synthesis ◽  
The Matrix ◽  
Shs Casting

Al2O3-TiC particles reinforced iron matrix functionally gradient material is successfully fabricated by combining the methods of self-propagating high-temperature synthesis (SHS) with casting. The SHS products are analyzed by SEM and XRD and EDS. The results show that the grain size of the particle is round 1μm~3μm, the composition of the Al2O3-TiC/ Fe surface composite takes on a gradient distribution from outside to inside, and transforms gradually to the matrix metal. The hardness below 0.5mm from exterior surface of the functionally gradient materials increases dramatically and gradually changes to the hardness of the matrix. Key words: In situ generation; SHS; Casting; Surface composite material; FGM

Wear and Morphology Investigation of Cr/WC-Ni Based Composite Coating by Laser Cladding

2014 ◽  
Vol 1061-1062 ◽  
pp. 538-541
Author(s):  
Zhi Hong Dong ◽  
Hong Yuan Fan
Keyword(s):  
Magnetron Sputtering ◽  
Composite Coating ◽  
Laser Cladding ◽  
Die Steel ◽  
Hardness Tester ◽  
Coating Surface ◽  
Metallurgical Bonding ◽  
Spray Technique ◽  
The Matrix ◽  
Hardness Values

Cr/WC-Ni composite coating was prepared on Cr12MoV die steel by thermal spray technique, and then further treated using laser cladding technique. WC powders was coated Cr by D.C. magnetron sputtering method. The structure, composition, hardness, morphology were analyzed and measured by XRD and SEM and hardness tester. Tribological experiments were carried out on an abrasion machine. The results showed thatCr film prevented WC decomposition, and Cr/WC-Ni coating had the higher hardness values compared with WC-Ni coating. After the treatment with the laser cladding, the coating surface was uniform and compact and had no cracks, the boding between the matrix and coating surface had a good metallurgical bonding, and sub-surface showed a higher hardness.

Effect on Microstructure and Hardness of Plunger Piston of Fe-Based Composite Coating by Laser Cladding

2011 ◽  
Vol 189-193 ◽  
pp. 830-833
Author(s):  
Yong Tao Zhao ◽  
Wen Xue Li ◽  
Jun Wei Zhou
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Second Phase ◽  
Micro Hardness ◽  
Hardness Testing ◽  
Matrix Metal ◽  
Cladding Layer ◽  
Hard Particles ◽  
The Matrix ◽  
Metal Microstructure

The laser cladding of Fe power technology was used to repair worn plunger piston surface. The microstructure of cladding layer, binder course and the matrix were observed by OM and SEM. Besides, the micro-hardness of different zones was measured through micro-hardness testing. The results show that the matrix metal microstructure of plunger piston is made of ferrite and austenite. By laser cladding Fe-based power on base metal, the cladding layer grain is fine and uniform, grain growth has obvious direction and finally become dendrites oriented, the microstructure of cladding layer is both second-phase hard particles and Fe-based solutes. The combination between matrix and cladding layer is smooth, belong to metallurgy bonding. The hardness of cladding layer is higher than that of other parts in three parts, the max value of micro-hardness is about 1250HV, it can agree with wear resistance need of plunge piston surface.

Mechanism of the Strain Rate Effect of Metal Foams with Numerical Simulations of 3D Voronoi Foams during the Split Hopkinson Pressure Bar Tests

2015 ◽  
Vol 12 (04) ◽  
pp. 1540010 ◽  
Author(s):  
B. Yang ◽  
Z. J. Liu ◽  
L. Q. Tang ◽  
Z. Y. Jiang ◽  
Y. P. Liu
Keyword(s):  
Strain Rate ◽  
Numerical Simulations ◽  
Strain Rate Sensitivity ◽  
Split Hopkinson Pressure Bar ◽  
Rate Sensitivity ◽  
Metal Foams ◽  
Hopkinson Pressure Bar ◽  
Matrix Metal ◽  
The Matrix ◽  
Pressure Bar

With the demand of lightweight structure, more and more metal foams were employed as impact protection and efficient energy absorption materials in engineering fields. But, results from different impact experiments showed that the strain rate sensitivity of metal foams were different or even controversial. In order to explore the true hiding behind the controversial experimental data about the strain rate sensitivity of metal foams, numerical simulations of split Hopkinson pressure bar (SHPB) tests of the metal foams were carried out by finite element methods. In the analysis, cell structures of metal foams were constructed by means of 3D Voronoi, and the matrix metal was assumed to be no strain rate sensitivity, which helps to learn the strain rate effects quantitatively by the foam structures. Numerical simulations showed that the deformation of the metal foam specimen is not uniform during the SHPB tests along the specimen, and the strain–stress relations of the metal foams at two ends of the specimen are different; there exists strain rate sensitivity of the metal foams even the matrix metal has no strain rate sensitivity, when the strain of the metal foams is defined by the displacement difference between the ends of the specimen; localized deformation of the metal foams and the inertia effect of matrix metal are the two main contributions to the strain rate sensitivity of the metal foams.

Investigation on TiCP/Al Composite Coating by TIG Cladding

2014 ◽  
Vol 490-491 ◽  
pp. 29-33 ◽  
Author(s):  
Wen Bo Tang ◽  
Cong Hui Lu ◽  
Yan Peng Li
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Testing Machine ◽  
Wear Testing ◽  
Alloy Surface ◽  
Al Composite ◽  
The Matrix ◽  
Tic Particle

TiCp/Al composites coating was in-situ synthesized on the L1060 alloy surface by TIG cladding. The microstructure and the phase of the coating were analyzed by OM, SEM, ADS and XRD, and the properties was been tested by micro-hardnessmeter and wear testing machine. The results show that the composite coating has no porosity, inclusions and other defects. The microstructure of the composite coating mainly consists of TiC particle and aluminum. Microstructural evidence suggests that the formation of TiC occur not only by reaction between Ti dissolved in Al and Al4C3, but also by reaction between C dissolved in Al and Al3Ti. The hardness of the composite coating obtained by TIG cladding is up to 120HV0.2. The wear resistance of composite coating is 1.6 times more than that of the matrix.

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