Room temperature impact‐induced deposition of pure SiC coating layer by vacuum kinetic spraying

2019 ◽  
Vol 103 (1) ◽  
pp. 54-59
Author(s):  
Kyu‐Sik Kim ◽  
Kee‐Ahn Lee
Keyword(s):  
Room Temperature ◽  
Coating Layer ◽  
Temperature Impact ◽  
Kinetic Spraying

Effect of Nitrogen Electrolytes on Al2021 Alloy by Electrolytic Plasma Processing

2013 ◽  
Vol 378 ◽  
pp. 213-219
Author(s):  
Byunh Hyun Ahn ◽  
Dong Gun Lee ◽  
Je Hyun Lee ◽  
Uk Rae Cho ◽  
Bon Heun Koo
Keyword(s):  
Room Temperature ◽  
Coating Layer ◽  
Plasma Processing ◽  
Nitrogen Supply ◽  
X Ray ◽  
Composition And Structure ◽  
Electrolytic Plasma Processing ◽  
Evolution Of Microstructure ◽  
Wear Tests ◽  
Scanning Electron

AlON-Al2O3coatings were prepared on Al2021 alloy by the electrolytic plasma processing (EPP) method. NaNO2, NaNO3and NH4NO3were chosen as nitrogen supply agents. The nitrogen inducing effect was studied by a combined composition and structure analysis of the coating layer carried out by X-ray diffractometer (XRD), scanning electron microscopy (SEM) for the specimens EPP-treated at room temperature for 15 min under a hybrid voltage of 260V DC plus 200V AC (50Hz) power. Microhardness tests and wear tests were carried out to correlate the evolution of microstructure and resulting mechanical properties.

Study on Elevated Temperature Impact Properties of 20MnSiV Steel

2012 ◽  
Vol 602-604 ◽  
pp. 313-317
Author(s):  
Da Yong You ◽  
Yin Lan Bai
Keyword(s):  
Elevated Temperature ◽  
Test Temperature ◽  
Fracture Mechanism ◽  
Room Temperature ◽  
Strain Softening ◽  
Practical Significance ◽  
Stress Strain ◽  
Strain Fracture ◽  
Temperature Impact ◽  
Longitudinal Extension

The test of 20MnSiV Ⅲ grade reinforced bar is carried out at room temperature and other nine temperatures: 100°C、200°C、300°C、400°C、500°C、600°C、700°C、800°C、900°C.The results show that, the highest impact absorbing energy 137J appeared when the test temperature is 200°C, while the lowest is 75.5J when the temperature is 600°C. While the test temperature is over 700°C and the sample is near damaged, strain softening and serious longitudinal extension is happened in the course of impact, and the gap of the sample can not result in the concentration of stress-strain, fracture mechanism of the material is changed, and then impact absorbing energy had no practical significance.

Influence of Processing Factors on the Surface Properties of Zirconia Coatings Fabricated by Room Temperature Spray Process

2020 ◽  
Vol 20 (7) ◽  
pp. 4152-4157
Author(s):  
Jeong Jun Kim ◽  
Jong Kook Lee
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Surface Properties ◽  
Room Temperature ◽  
Coating Layer ◽  
High Surface ◽  
Phase Changes ◽  
Deposition Cycle ◽  
Implant Surface ◽  
Processing Factors

Highly roughened surfaces on dental implants enhance the bone-bonding ability and in vivo cell adhesion on the implant surface. In this study, zirconia substrates were coated by powder coating using room temperature spray processing to improve their surface properties. Processing factors (particle size of the starting powder, number of repetitions of the deposition cycle, and spraying distance) were controlled to form a dense coating layer with high surface roughness on the zirconia substrate. Starting zirconia powders for coating were heat-treated at high temperature to control the particle size and kinetic energy. The coating layer fabricated from starting powder with a particle size of about 1.52 μm shows a homogeneous and dense microstructure, and it has a maximum surface roughness about 0.37 μm. The surface roughness of the film coatings increased with the number of times that the deposition cycle was repeated. No phase changes between the starting powder and the coating layer were observed, and all of the materials show identical tetragonal phases.

Reduced graphene oxide as an over-coating layer on silver nanostructures for detecting NH3 gas at room temperature

2014 ◽  
Vol 194 ◽  
pp. 45-50 ◽  
Author(s):  
Quang Trung Tran ◽  
Huynh Tran My Hoa ◽  
Dae-Hwang Yoo ◽  
Tran Viet Cuong ◽  
Seung Hyun Hur ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Coating Layer ◽  
Silver Nanostructures ◽  
Reduced Graphene

scholarly journals Morphology and Structure of Compacted Coated Powders Studied by SEM and TEM

2008 ◽  
Vol 14 (S3) ◽  
pp. 31-34
Author(s):  
F. Simões ◽  
B. Trindade
Keyword(s):  
High Temperatures ◽  
Material Properties ◽  
Room Temperature ◽  
Coating Layer ◽  
Bulk Material ◽  
Hot Isostatic Pressing ◽  
Al Alloys ◽  
Morphology And Structure ◽  
High Plastic ◽  
Oxidation And Corrosion

The interest in titanium based intermetallics, such as Ti-Al alloys, for high temperatures applications has been increased in recent years mainly due to their high plastic deformation resistance, chemistry stability (oxidation and corrosion resistance) and creep and fatigue resistance at high temperatures. However, the industrial application of Ti-Al intermetallics is very limited so far, due to the lack of ductility and fracture toughness at room temperature with associated processing difficulties. To overcome this problem and to improve mechanical properties of Ti-Al intermetallics, a powder mixture with atomic composition of Ti52Al48 was synthesized by mechanical alloying (MA) and subsequently coated with a ductile element (aluminium), by d.c. magnetron sputtering. Later, in order to obtain a compacted material, as final step, the coated MA'ed powders were submitted to hot isostatic pressing (HIP), giving rise to a bulk material. The aim of the current work is to understand the influence of coating layer in mechanical alloyed (MA'ed) powders and the influence in bulk material properties.

In Situ Al/Al2O3 Composite Coating on Steel Substrate Prepared by Mechanical Alloying at High Temperature

2014 ◽  
Vol 896 ◽  
pp. 582-585
Author(s):  
Agus Sukarto Wismogroho ◽  
Wahyu Bambang Widayatno
Keyword(s):  
Composite Coating ◽  
Room Temperature ◽  
Coating Layer ◽  
Steel Substrate ◽  
High Hardness ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Energy Ball ◽  
A New Technique

In this study a new technique for producing an Al/Al2O3composite coating on a steel substrate by an in situ process was examined. The pre-treating of the steel substrate with Al was carried out by MA at room temperature, followed by MA using a low-energy ball mill at 200-500°C. An Al/Al2O3coating layer with a homogenous distribution of Al2O3particles were achieved. The coating layer has not only high hardness but also high fracture toughness.

Study on Performance of PP/POE In Situ Compatibilization

2012 ◽  
Vol 468-471 ◽  
pp. 1053-1057
Author(s):  
Yun Feng Yang ◽  
Guo Sheng Hu ◽  
Xing Lin Ren
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Impact Strength ◽  
Room Temperature ◽  
Dicumyl Peroxide ◽  
Maximum Value ◽  
Trimethylolpropane Triacrylate ◽  
In Situ Compatibilization ◽  
Temperature Impact

By the in situ compatibilization, PP/POE blends were prepared with dicumyl peroxide (DCP) as initiator, Trimethylolpropane triacrylate (TMPTA) as co-during systems and the metallocene polyolef in elastomers ploy (ethylene-1-octene) (POE) as toughening rubber. The effects of additive amount for TMPTA、POE on the mechanical properties were studied. The results showed that the maximum value of the room-temperature and low-temperature impact strength for the composite was reached to 52.03KJ/m2 and 37.29KJ/m2, and the elongationfor was reached to 482.74%.

Effect of Thermal Barrier Coating Layer on HIP Treated IN738LC Fatigue Characteristic

2006 ◽  
Vol 306-308 ◽  
pp. 109-114 ◽  
Author(s):  
Shunichi Kuba ◽  
Yoshitaka Kojima ◽  
Hideto Suzuki
Keyword(s):  
Fatigue Life ◽  
Room Temperature ◽  
Coating Layer ◽  
Testing Machine ◽  
Thermal Barrier ◽  
Fatigue Characteristic ◽  
Barrier Coating ◽  
Small Test ◽  
Superalloy In738lc ◽  
Base Superalloy

The fatigue characteristic of thermal barrier-coated Ni-base superalloy IN738LC at room temperature was studied by fatigue test using SEM-servo testing machine. In order to eliminate the influence of micro-shrinkage in IN738LC and purely investigate the effect of TBC on fatigue characteristic, HIP treated IN738LC was used in comparison with NON-HIP treated one. The results indicate that HIP treatment is effective to remove micro-shrinkage and fatigue life is greatly improved. The TBC coating layer is a strength member in the small test specimen at room temperature, and TBC coated material showed lower fatigue life rather than IN738LC without TBC.

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