scholarly journals Influence of Cu Content on the Microstructure and Mechanical Properties of Cr-Cu-N Coatings

Scanning ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Ji Cheng Ding ◽  
Teng Fei Zhang ◽  
Zhi Xin Wan ◽  
Hai Juan Mei ◽  
Myung Chang Kang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solution Structure ◽  
Rf Magnetron Sputtering ◽  
Hybrid Coating ◽  
Cross Sectional ◽  
Cu Content ◽  
Microstructure And Mechanical Properties ◽  
Pulsed Dc ◽  
Coating Composition ◽  
Si Wafer

The Cr-Cu-N coatings with various Cu contents (0–25.18 (±0.17) at.%) were deposited on Si wafer and stainless steel (SUS 304) substrates in reactive Ar+N2 gas mixture by a hybrid coating system combining pulsed DC and RF magnetron sputtering techniques. The influence of Cu content on the coating composition, microstructure, and mechanical properties was investigated. The microstructure of the coatings was significantly altered by the introduction of Cu. The deposited coatings exhibit solid solution structure with different compositions in all of the samples. Addition of Cu is intensively favored for preferred orientation growth along (200) direction by restricting in (111) direction. With increasing Cu content, the surface and cross-sectional morphology of coatings were changed from triangle cone-shaped, columnar feature to broccoli-like and compact glassy microstructure, respectively. The mechanical properties including the residual stress, nanohardness, and toughness of the coatings were explored on the basis of Cu content. The highest hardness was obtained at the Cu content of 1.49 (±0.10) at.%.

scholarly journals Effect of Mo Addition on The Microstructure and Mechanical Properties of CoCuFeNi High Entropy Alloy

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1017
Author(s):  
Yang Shao ◽  
Huan Ma ◽  
Yibing Wang
Keyword(s):  
Mechanical Properties ◽  
Solution Structure ◽  
Tensile Tests ◽  
Atomic Ratio ◽  
Vacuum Arc ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Microstructure And Mechanical Properties ◽  
Mo Content

In order to reveal the effect of Mo addition on the microstructure and mechanical properties, (CoCuFeNi)100-xMox (x = 0, 10, 15, 19, and 25, x values in atomic ratio) high entropy alloys were prepared by vacuum arc-melting. The results showed that with Mo addition, the μ phase formed and serious separation occurred in the high entropy alloys. The content of μ phase increased with the increase in Mo content. The microstructure of the alloys changed from an initial single-phase face-center-cubic (FCC) solid solution structure (x = 0) to a hypoeutectic microstructure (x = 15), then to a full eutectic microstructure (x = 19), and finally to a hypereutectic microstructure (x = 25). Coherent interface between μ phase and FCC phase was observed. The (CoCuFeNi)81Mo19 alloy with fully eutectic microstructures exhibited the highest yield strength of 557 MPa and fracture strength of 767 MPa in tensile tests at room temperature. The fracture surface revealed that the formation of great amounts of the μ phase resulted in the loss of ductility of (CoCuFeNi)100-xMox alloys.

The effect of substrate bias on the characteristics of CrN coatings deposited by DC-superimposed HiPIMS system

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744032 ◽  
Author(s):  
X. Zuo ◽  
F. Xia ◽  
D. Zhang ◽  
P. L. Ke ◽  
Q. M. Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bias Voltage ◽  
Indentation Test ◽  
Grain Structure ◽  
Substrate Bias ◽  
Cross Sectional ◽  
Microstructure And Mechanical Properties ◽  
Columnar Grain ◽  
Influence Of Substrate ◽  
Crn Coatings

Chromium nitride coatings were prepared by reactive DC-superimposed high-power-impulse magnetron sputtering (HiPIMS) system. The influence of substrate bias on the microstructure and mechanical properties of CrN coatings was investigated. XRD and cross-sectional SEM were utilized to characterize the film structures. Mechanical properties were characterized by nanoindentation and Vickers indentation test. The results revealed that the microstructure and mechanical properties of CrN coatings were affected by bias voltage. The CrN coatings exhibited dense and fine columnar grain structure with the hardness of about 18.7 GPa. The fracture toughness of CrN coatings was around 3.16 MPa ⋅ m[Formula: see text]. However, further increase of the bias voltage from −250 V to −300 V led to the degradation of coating properties.

Effect of Working Pressure on Microstructure and Mechanical Properties of Magnetron Sputtered ZrN Coatings

2010 ◽  
Vol 154-155 ◽  
pp. 1659-1663
Author(s):  
Zheng Bing Qi ◽  
Peng Sun ◽  
Fang Ping Zhu ◽  
Ruo Xuan Huang ◽  
Zhou Cheng Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Elastic Modulus ◽  
Failure Modes ◽  
Columnar Structure ◽  
Scratch Testing ◽  
Working Pressure ◽  
Cross Sectional ◽  
Microstructure And Mechanical Properties ◽  
Equiaxed Grains

The influence of working pressure on microstructure and mechanical properties of magnetron sputtered ZrN coatings were systemically investigated. The results reveal that a decreased working pressure results in preferred orientation evolution from (111) to (200) and cross-sectional morphologies transition from columnar structure to equiaxed grains. These microstructural changes are considered responsible for an increase in hardness and modulus with decreasing working pressure. Chip spallation and plastic deformation failure modes are observed during scratch testing, and the increased critical loads are attributed to higher hardness and elastic modulus, as well as moderate compressive stress at lower working pressure.

Microstructure and Mechanical Properties of Cr-C-N, Cr-Si-N and Cr-Si-C-N Coatings by a Hybrid Coating System

2007 ◽  
Vol 336-338 ◽  
pp. 2224-2227 ◽  
Author(s):  
Chul Sik Jang ◽  
Young Rae Cho ◽  
Myung Chang Kang ◽  
Won Sub Chung ◽  
Kwang Ho Kim
Keyword(s):  
Mechanical Properties ◽  
Friction Coefficient ◽  
Carbon Content ◽  
Comparative Studies ◽  
Microstructural Change ◽  
Hybrid Coating ◽  
Coating System ◽  
Ion Plating ◽  
Microstructure And Mechanical Properties ◽  
Crn Coatings

CrN-based multi-component coatings were deposited by a hybrid coating system combining the arc ion plating (AIP) and sputtering technique. In this work, comparative studies on microstructure and mechanical properties of microhardness and wear behaviors among Cr-C-N, Cr-Si-N, and Cr-Si-C-N coatings were systematically conducted. Adding carbon and silicon atoms into CrN coatings had large effects on microstructural change and mechanical properties of CrN coatings. The hardness value of Cr-Si-C-N coatings showed about 44 GPa, while those of Cr-Si-N and Cr-C-N coatings were 34 and 23 GPa, respectively. The average friction coefficient of CrN-based coatings decreased from 0.65 to 0.4 with the incorporation of silicon and carbon content.

The Effects of Cu Content on Microstructure and Mechanical Properties of Thixoformed A319 Aluminium Alloys

2014 ◽  
Vol 548-549 ◽  
pp. 237-241
Author(s):  
M.S. Salleh ◽  
M.Z. Omar ◽  
J. Syarif ◽  
K.S. Alhawari ◽  
M.N. Mohammed
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloys ◽  
Scanning Calorimetry ◽  
Fraction Liquid ◽  
Cu Content ◽  
Cooling Slope ◽  
Microstructure And Mechanical Properties ◽  
A319 Alloy ◽  
Cooling Slope Casting ◽  
Effect Of Copper

The effect of copper contents on the microstructure and mechanical properties of A319 aluminium alloy in thixoformed conditions was investigated. The results showed that the addition of 1 wt. % and 2 wt. % copper to A319 alloy reduced the fraction liquid sensitivity and enlarged the working window temperature. Based on the differential scanning calorimetry (DSC) data, the curve of the fraction liquid versus temperature was constructed for each alloy, indicated the temperatures corresponded to the fraction liquid of 30% and 50%. It was found that the working window temperature for A319 alloy of 7 oC increased to 12 °C when 2 wt. % copper was added, while the sensitivity decreased from 0.027 °C-1 to 0.016 °C-1.The alloy feedstocks produced by cooling slope casting were thixoformed successfully at 40% fraction liquid. The thixoformed A319 alloys attained a hardness level as high as 118.2 ± 2.5 HV when 2 wt. % copper was added.

Effects of Cu content on microstructure and mechanical properties of Al–14.5Si–0.5Mg alloy

2010 ◽  
Vol 61 (11) ◽  
pp. 1074-1079 ◽  
Author(s):  
Chih-Ting Wu ◽  
Sheng-Long Lee ◽  
Meng-Hsiung Hsieh ◽  
Jing-Chie Lin
Keyword(s):  
Mechanical Properties ◽  
Cu Content ◽  
Microstructure And Mechanical Properties

Microstructure and Mechanical Properties Characterisation of Nanocrystalline Copper Films

2007 ◽  
Vol 1049 ◽  
Author(s):  
Nursiani Indah Tjahyono ◽  
Yu Lung Chiu
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Copper Film ◽  
Constant Current ◽  
Surface Finishing ◽  
Cross Sectional ◽  
Plan View ◽  
Copper Sulphate Solution ◽  
Nanocrystalline Copper ◽  
Microstructure And Mechanical Properties

AbstractThe microstructure and mechanical properties of nanocrystalline copper with grain size ranging from 50 nm to 80 nm have been investigated. Thin films of nanocrystalline copper were electrodeposited from an additive-free acidified copper sulphate solution at room temperature by employing constant current at different current density magnitudes between 20 and 80 mA/cm2. Both austenitic and ferritic steel substrates with the same surface finishing conditions have been used for the deposition. The microstructure of the thin films has been further studied using electron microscopy techniques, and the mechanical properties using nanoindentation technique. The nanoindentation study was carried out on both the plan view and cross-sectional directions to study the isotropy characteristic of the copper film. It has been noted that both the modulus and hardness measured following the Oliver-Pharr scheme show an apparent indentation size effect tested on the cross-sectional sample.

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