Enhancing the shear strength and oxidation resistance of aluminum-chromium phosphate heat-dissipating coatings by the introduction of a micro arc oxidation transition layer

2018 ◽  
Vol 356 ◽  
pp. 56-63 ◽  
Author(s):  
Zhikai Liu ◽  
Qiu Sun ◽  
Ying Song ◽  
Jiao Yang ◽  
Xiangqun Chen ◽  
...  
Keyword(s):  
Shear Strength ◽  
Oxidation Resistance ◽  
Transition Layer ◽  
Micro Arc Oxidation ◽  
Chromium Phosphate

The Research of the Orgince Silicone Emulsion Hybridized Chromium-Aluminum Phosphate Composites

2013 ◽  
Vol 699 ◽  
pp. 519-523
Author(s):  
Da Qing Chen ◽  
Hai Bin Wang ◽  
Ji Chuan Huo ◽  
Yong Lin Lei ◽  
Wei Ai
Keyword(s):  
Shear Strength ◽  
Flexural Strength ◽  
Aluminum Phosphate ◽  
Lap Shear Strength ◽  
Lap Shear ◽  
Silicone Emulsion ◽  
Chromium Phosphate

In the paper ,the preparation of the orgincesilicone emulsion hybridized chromium-aluminum phosphateand thecomposites was studied.The aluminum-chromium-phosphate washybridizedbyadding the orgincesilicone emulsio-n, the tensile lap-shear strength of the hybridized aluminum-chromium-phosphateincreasedfrom1.2MPato4.0MPaor more, its dielectricconstantwasreducedfromabout 4.0toabout3.6; the flexural strength of the composites was increased from80Mpa tomore than120Mpa and the the moisture rate of the composites reduced to about 1.6%

scholarly journals Influence of Rolling Temperatures on Interface Microstructure and Mechanical Properties of Multi-Pass Rolling TA1/Q235B Explosive Welded Sheets

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1654
Author(s):  
Huizhong Li ◽  
Liangming Cao ◽  
Xiaopeng Liang ◽  
Wending Zhang ◽  
Chunping Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Hot Rolling ◽  
Transition Layer ◽  
Rolling Temperature ◽  
Rolled Sheet ◽  
Interface Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Rolling Temperatures

The effect of rolling temperatures on the interface microstructure and mechanical properties is investigated using 2-mm-thick TA1/Q235B composite sheets, which were prepared after nine passes of hot rolling of explosive welded plates. The results show that the vortex region and the transition layer exist in the interface at the explosive welded plate, while only the transition layer exists in the interface after hot rolling. The transition layer is composed of α-Ti, TiC, Fe, and FeTi, and the thickness increases with the increasing rolling temperature. The microhardness of the explosive welded plate is higher than that of the hot-rolling sheet, and the microhardness of interface are higher than that of matrix metals. The interface shear strength and tensile elongation of the hot-rolled sheet increase with the increasing hot rolling temperature, while the ultimate tensile strength (UTS), yield strength (YS) and Young modulus decrease with the increase of hot rolling temperature. The shear strength of sheets is related to the interfacial compounds, and the tensile strength is mainly affected by the grain morphology of the matrix.

ADVANCER NITRIDE BONDED SILICON CARBIDE

Alloy Digest ◽  
1992 ◽  
Vol 41 (4) ◽  
Keyword(s):  
Silicon Carbide ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Oxidation Resistance ◽  
High Temperature Strength ◽  
Kiln Furniture ◽  
Low Mass ◽  
Long Life

Abstract ADVANCER NITRIDE BONDED SILICON CARBIDE has exceptional high-temperature strength. Its oxidation resistance assures long life. It is a low-mass ceramic that is ideally suited to kiln furniture. This datasheet provides information on composition, physical properties, elasticity, and shear strength. Filing Code: Cer-11. Producer or source: Norton Company.

Study on Properties of Al2TiO5 Coating on Ti-6Al-4V Titanium Alloy

2013 ◽  
Vol 575-576 ◽  
pp. 348-351
Author(s):  
Nian Suo Xie ◽  
Jin Wang
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Sulfuric Acid ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Acid Corrosion ◽  
Temperature Oxidation ◽  
Micro Arc Oxidation ◽  
Sulfuric Acid Corrosion

The Al2TiO5Coating was deposited on Ti-6Al-4V alloy substrate by homemade micro-arc oxidation system. The microstructure of Ti-6Al-4V titanium alloy, the phase of coating, the bonding force of the coating and matrix, sulfuric acid corrosion resistance and high-temperature oxidation resistance were study by inverted microscope model, Xray diffract meter, scanning electron microscopy, the coating adhesion automatic scratch tester, box-type furnace. The results show that the phase of coating is composed of Al2TiO5and Al2SiO5, and Al2TiO5.is the main component, the coating surface consists of discharging pit and flange which are unequal in size, rough and overlap and micro-arc oxidation pit diameter increases with the voltage. When micro-arc oxidation voltage is constant, the longer micro-arc oxidation time, the greater the Ti-6Al-4V alloy coating and the substrate binding force. The corrosion resistance of Ti-6Al-4V alloy was improved in sulfuric acid due to micro-arc oxidation; the sulfuric acid corrosion resistance of the coated samples was improved 11 times when the micro-arc oxidation time increased from 5min to 60min. the high-temperature oxidation resistance of Ti-6Al-4V alloy with micro-arc oxidation coatings is higher than Ti-6Al-4V alloy without micro-arc oxidation coating.

Improvement of Oxidation Resistance of A NiAl Eutectic Alloy Doping with Dy

2010 ◽  
Vol 34-35 ◽  
pp. 1263-1268
Author(s):  
Guang Ye Zhang ◽  
Jin Lin Wang ◽  
You Ming Chen ◽  
Long Fei Liu ◽  
Yuan Jun Guo
Keyword(s):  
Oxidation Resistance ◽  
Eutectic Alloy ◽  
Transition Layer ◽  
Oxidation Behavior ◽  
Isothermal Oxidation ◽  
Al2o3 Layer

The isothermal oxidation behavior of NiAl-30.9Cr-3Mo-0.1Dy alloy has been investigated in the paper. The results reveal that Dy-addition significantly improves the oxidation resistance, which is attributed to the formation of continuously compact Al2O3 layer and rich-Cr transition layer on the surface of the tested alloy.

scholarly journals Mechanical Properties And Joining Mechanism of Magnetic Pulse Welded Aluminum To Titanium

2021 ◽  
Author(s):  
Shujun Chen ◽  
Yang Han ◽  
Wentao Gong ◽  
Tao Yuan ◽  
Xiaoqing Jiang
Keyword(s):  
Shear Strength ◽  
Transition Zone ◽  
Base Metal ◽  
Transition Layer ◽  
Discharge Voltage ◽  
Magnetic Pulse ◽  
Magnetic Pulse Welding ◽  
Pulse Welding ◽  
Radial Gap ◽  
Single Orientation

Abstract Magnetic pulse welding of dissimilar aluminum and titanium was investigated to optimize process parameters in terms of discharge voltage, radial gap and overlapping length. Moreover, impacting modes at different overlapping lengths were discussed. The joining mechanism was analyzed from aspects of microstructure, composition and hardness distribution. The shear strength increased with increasing discharge voltages, whereas shear strength decreased at first and then increased with the increasing radial gap, which has a more significant influence on shear strength than discharge voltage. Three impacting modes were proposed as bidirectional impacting, overall impacting and single-orientation impacting. However, the single-orientation impacting mode has the highest effective joining ratio. The welded joints were divided into four transition layer interfaces: continuous transition zone, transition zone with cracks, intermittent transition zone, and non-transition zone. Waves and intermetallic compounds are the two characteristics of the Al-Ti joint welded by magnetic pulse welding. The metal's hardness near the joint surface is higher than that of the base metal. In addition, Al3Ti and aluminum base metal were found in the transition layer of the joint.

Preparation and Oxidation Properties of Carbon/Carbon Composites with the Antioxidant SiC/NiCS Coating

2017 ◽  
Vol 727 ◽  
pp. 881-888
Author(s):  
Yi Li ◽  
Fan Hao Zeng ◽  
Ji An Liu ◽  
Zhi Huan Zou ◽  
Yi Gu
Keyword(s):  
Oxidation Resistance ◽  
Transition Layer ◽  
Bending Strength ◽  
Retention Rate ◽  
Isothermal Oxidation ◽  
Carbon Composites ◽  
Before And After ◽  
Oxidation Properties ◽  
Short Time ◽  
Strength Retention

In the paper, the SiC/NiCS coating on carbon/carbon composites was designed and prepared, and its oxidation properties was investigated. The SiC transition layer is prepared by embedding method while the NiCS coating by brushing slurry. Oxidation resistance of various coatings and the same coating sintered by different ways are analyzed through the isothermal oxidation experiment. The strength retention of the samples after oxidation is tested through the three-point bending experiment. The surface and cross section morphology of the coating before and after oxidation are observed by SEM, and crystalline phases of the coating are analyzed by XRD. According to the results, the coating have excellent short-time oxidation resistance, and the weightless rate with oxidation time presents linear increasing trend basically. With the increase of temperature, the weight-loss rate increases. The more serious oxidation is, the lower bending strength retention rate is. The integrity and density of the barrier layer and the across-running cracks of the silicon carbide transition layer are the main factors influencing the oxidation resistance of the sample.

TRIBALOY T-400C

Alloy Digest ◽  
2006 ◽  
Vol 55 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Shear Strength ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Corrosion And Wear ◽  
Laves Phase ◽  
Powder Metal ◽  
Hardfacing Alloy ◽  
Corrosion And Oxidation

Abstract Tribaloy T-400C is a cobalt hardfacing alloy with Laves phase particles to promote wear resistance while improving corrosion and oxidation resistance over T400. This datasheet provides information on composition, hardness, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion and wear resistance as well as casting, joining, and powder metal forms. Filing Code: CO-114. Producer or source: Deloro Stellite Company Inc.

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