Properties of Multi-Function Micro-Plasma Sprayed Nanostructured Al2O3-13wt%TiO2 Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 59-63
Author(s):  
Liu Ying Wang ◽  
Gu Liu ◽  
Han Gong Wang ◽  
Shao Chun Hua
Keyword(s):  
Mechanical Properties ◽  
Plasma Spray ◽  
Bonding Strength ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tensile Tester ◽  
Powder Particles ◽  
Plasma Sprayed ◽  
Electronic Microscope ◽  
Microhardness Tester

Nonastructured Al2O3-13wt%TiO2 (AT13) coatings were deposited by multi-function micro-plasma spray and Metco 9M plasma spray, respectively. Constituent phases and the microstructure of the powder particles and coatings prepared were examined with the aid of scanning electronic microscope (SEM) and X-ray diffraction (XRD). Mechanical properties including hardness and bonding strength were also evaluated by microhardness tester and electron tensile tester. Multi-function micro plasma sprayed nanostructured AT13 Coating is fully-melted, dense and uniform. However, AT13 Coating deposited by Metco 9M plasma spray is partial-melted. The microhardness of multi-functional micro plasma sprayed AT13 Coating is HV975.7~1441.7, much higher than that of Metco 9M plasma sprayed AT13 Coating (HV655.3~946.6). The bonding strength results present the same, increased from 19.8 MPa to 42.7 MPa.

Microstructure and Properties of Multi-Function Micro-Plasma Sprayed Al2O3 Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 51-54 ◽  
Author(s):  
Shao Chun Hua ◽  
Han Gong Wang ◽  
Liu Ying Wang ◽  
Gu Liu
Keyword(s):  
Particle Velocity ◽  
Plasma Spray ◽  
Bonding Strength ◽  
Main Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microstructure And Properties ◽  
Powder Feed ◽  
Α Al2o3 ◽  
Plasma Sprayed

Al2O3 coatings were fabricated by multi-functional micro-plasma spray through axial powder feed. The flight particle velocity and temperature were measured by SprayWatch-2i. With the rising of Ar flow, the velocity of Al2O3 particles increases, but the temperature of particles decreases gradually. Al2O3 coatings were analyzed by SEM and XRD. The microstructure of coatings is density, low porosity and uniform morphology. X-ray diffraction results show that α-Al2O3 is the main phase in the original Al2O3 powders, but Al2O3 coatings consist of γ-Al2O3 and a small amount of α-Al2O3. The microhardness and bonding strength of Al2O3 coatings were also measured, which is HV0.11183~1387 and 28.6MPa, respectively.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

Synthesis and Characterization of 3Y-TZP by Gel Solid-State Method

2011 ◽  
Vol 412 ◽  
pp. 61-64
Author(s):  
Xiao Bo Wu ◽  
Da Zhi Sun ◽  
Dan Yu Jiang ◽  
Hai Fang Xu ◽  
De Xin Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Sintering Behavior ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Powder Particles ◽  
State Method ◽  
Average Size

3Y-TZP powder has been successfully synthesized by gel solid-state method. The structural phases of powder particles were analyzed by X-ray diffraction and the morphology was analyzed by scanning electron microscopy. The average size of grains was 230 nm. The sintering behavior, mechanical properties and microstructure of 3Y-TZP ceramics sintered by this powder were investigated. The experiment results showed that the mechanical properties of ceramics were excellent.

Effects Studying of Annealing to Mechanical Properties Carbon-Doped Ti-O Films Synthesized Using CO2 Gas

2017 ◽  
Vol 727 ◽  
pp. 915-922
Author(s):  
Hong Wu Liu ◽  
Yong Yao Su ◽  
Xiao Yu Huang ◽  
Jian Lu Xue ◽  
Feng Wen
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Annealing Temperature ◽  
Mechanical Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon Doped ◽  
Structure And Morphology ◽  
Xrd Studies ◽  
Electronic Microscope

Carbon-doped Ti-O films were deposited on steel and silicon wafer by DC reaction magnetron sputtering (R-MS) using CO2 as carbon and oxygen source. A series of films were prepared by means of changing the flow of CO2 or O2. The effects of annealing temperature ranging from 300 to 650°C on the properties of Ti-O films under vacuum were studied. X-ray diffraction (XRD) and field emission scanning electronic microscope (FESEM) were employed to analyze and observe structure and morphology of pre-or after-annealed Ti-O films. nanoindentation was used to measure nanohardness and modulus, and recovery was also calculated by the curves of load-displacement. Roughness and thickness were estimated by surface profiler. The XRD studies revealed that the doping of carbon was beneficial to the crystallization of the films. The results showed that the particle size of Ti-O films increased with the increase of annealing temperature, as-annealed carbon-doped Ti-O films have fair mechanical performance.

Influence of RE on Microstructure and Mechanical Properties of Mg-Li-Al Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 211-216 ◽  
Author(s):  
Bin Liu ◽  
M.L. Zhang ◽  
Zhong Yi Niu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Melting Furnace ◽  
Optical Microscope ◽  
Al Alloys ◽  
X Ray Diffraction ◽  
Vacuum Melting ◽  
X Ray ◽  
Electronic Microscope ◽  
Cast Microstructure

A series of alloys were designed and prepared using vacuum melting furnace. The as-cast microstructure and phase compositions of these alloys were characterized by optical microscope, X-ray diffraction (XRD) and scanning electronic microscope (SEM). The hardness and mechanical properties of alloys at room temperature were measured as well. The results show that the addition of RE leads to the formation of intermetallic Al3La distributed within grain boundaries. The intermetallic compound with oriented structure impedes grain growth, and refines the grain. The strength and the hardness of the alloys increase with the increase of the RE content in the range of 0.2-0.8 wt %.

Microstructure and Mechanical Properties of FeCrNiCoCu(B) High-Entropy Alloy Coatings

2011 ◽  
Vol 694 ◽  
pp. 502-507 ◽  
Author(s):  
Xiu Bing Liang ◽  
Wei Guo ◽  
Yong Xiong Chen ◽  
Lin Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Arc Spraying ◽  
High Entropy Alloy ◽  
X Ray Diffraction ◽  
Az91 Magnesium Alloy ◽  
X Ray ◽  
High Entropy ◽  
High Velocity Arc Spraying ◽  
Az91 Magnesium ◽  
Electronic Microscope

Two kinds of high-entropy alloy coatings of FeCrNiCoCu and FeCrNiCoCuB were deposited on AZ91 magnesium alloy substrate using high velocity arc spraying technology. Microstructure and general mechanical properties of the coatings were investigated with Scanning Electronic Microscope (SEM), X-Ray Diffraction instrument (XRD), microhardness tester and strength bond tester. The results show that the two kinds of coatings exhibit compact layered microstructure and the phase lattice type are both FCC, the microhardness of the FeCrNiCoCu and FeCrNiCoCuB coatings are 414HV0.1 and 342HV0.1 respectively, the bond strength are 36.9 MPa and 33.6 MPa respectively.

Nano-SiC Modified Plasma Sprayed Ceramic Coatings Prepared by Laser Sintering

2008 ◽  
Vol 375-376 ◽  
pp. 348-352 ◽  
Author(s):  
Zong Jun Tian ◽  
Li Da Shen ◽  
Yin Hui Huang ◽  
Guo Ran Hua
Keyword(s):  
Ceramic Coating ◽  
Ceramic Coatings ◽  
Laser Sintering ◽  
Laser Remelting ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bond Coating ◽  
Plasma Sprayed ◽  
Steel Substrates ◽  
Electronic Microscope

This paper describes an investigation of nano-SiC reinforced ceramic coating, which has included NiCrAl and Al2O3+13wt%TiO2 coatings pre-produced by atmosphere plasma spraying, implemented by laser sintering. Commercial NiCrAl powders were plasma sprayed onto 45 steel substrates to produce a bond coating with thickness of ~100μm. The Al2O3-TiO2 based coating with ~500μm thickness was then plasma sprayed on top of the NiCrAl bond coating. With CO2 laser, nano-SiC powders were laser sintered on Al2O3-TiO2 based coatings. The microstructure and chemical composition of the modified based coatings were analyzed by such detection devices as scanning electronic microscope (SEM) and x-ray diffraction (XRD). The results show that the size of SiC grains has no obvious growth. In addition, due to the nanostructured SiC phase and laser remelting, the modified coatings exhibited better abrasion resistance than those unmodified samples.

Effect of Heat Treatment on Structure and Phase Transformation of Rare Earth (Gd) Zirconate

2010 ◽  
Vol 163 ◽  
pp. 157-160 ◽  
Author(s):  
Grzegorz Moskal ◽  
Grzegorz Dercz
Keyword(s):  
Phase Transformation ◽  
Spherical Shape ◽  
Air Plasma ◽  
X Ray Diffraction ◽  
Cross Sectional ◽  
X Ray ◽  
Barrier Coating ◽  
Profile Fitting ◽  
Powder Particles ◽  
Plasma Sprayed

In the present work, zirconium gadolinium oxide (Gd2Zr2O7) ceramics were prepared by annealing in different conditions and with APS (air plasma sprayed) techniques for thermal barrier coating (TBC) application. Thermal properties, phase transformation, crystal structure and cross-sectional morphologies of these materials were investigated. The thermal behaviour of the material was investigated from room temperature to 1500°C using the differential thermal analysis (DTA). The X-ray diffraction methods were used for the qualitative phase analysis. The structure of the studied samples has been characterized by employing powerful Rietveld’s whole X-ray profile fitting technique using the DBWS 9807a program. The SEM and EDS techniques were used to in the ceramic samples morphology analysis and for their chemical composition, respectively. The research showed that further stages of annealing result in the phase transformation of the parent substances and the main phase Gd2Zr2O7. It was found out that complete phase transformation into Gd2Zr2O7 phase takes place only for the air plasma sprayed sample. The analysis of the morphology of the initial powder revealed the spherical shape of the powder particles, which have a porous internal structure.

Characterization of Atomized Powders and Extruded Samples of an Al-Si-Cu Alloy

2017 ◽  
Vol 899 ◽  
pp. 442-447
Author(s):  
Carlos Triveño Rios ◽  
C. Bolfarini ◽  
Walter José Botta Filho ◽  
Claudio Shyinti Kiminami
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Yield Strength ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cu Alloy ◽  
Powder Particles ◽  
Scanning Electron

In this work, the microestrutural characterization and mechanical properties of atomized Al-9Si-3Cu alloy powders and extruded samples are presented. The microstructure was evaluated by a combination of X-ray diffraction, optical microscopy and scanning electron microscopy. The mechanical properties of extruded samples were also characterized by tensile test and hardness measurements. The results revealed that the powder particles and the extruded samples are constituted by α-Al, intermetallic and metastable phases. The extruded samples obtained by the use of smaller atomized particles show lower ductility than with larger particles. The same behavior was observed with low extrusion temperature than with high temperatures. It was also observed minor variations in the yield strength and hardness with variation in the size of the powder particles.

Sign in / Sign up

Export Citation Format

Share Document