Mechanical properties of high deposition rate SiO2 films

1990 ◽  
Vol 8 (3) ◽  
pp. 1340-1343 ◽  
Author(s):  
C. V. Macchioni
Keyword(s):  
Mechanical Properties ◽  
Deposition Rate ◽  
High Deposition Rate ◽  
Sio2 Films

Influence of Substrate Temperature and Bias Voltage on Structure and Mechanical Properties of CrN Coatings

2013 ◽  
Vol 591 ◽  
pp. 99-103 ◽  
Author(s):  
Hao Zhang ◽  
Shu Wang Duo ◽  
Xiang Min Xu ◽  
Huan Ke ◽  
Ting Zhi Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Substrate Temperature ◽  
Deposition Rate ◽  
Bias Voltage ◽  
High Deposition Rate ◽  
Properties Of Coatings ◽  
Unbalanced Magnetron ◽  
Magnetron Sputter ◽  
Influence Of Substrate ◽  
Crn Coatings

CrN coatings have been deposited successfully by Closed Filed Unbalanced Magnetron Sputter Ion Plating (CFUMSIP). The effect of substrate temperature (TS) and bias voltage (VB) together on microstructure, morphologies and mechanical properties of CrN coatings were studied. The results showed that the deposition rate of CrN coatings declines with the increase of VB Under both room temperature (R.M.) and 300°C. The FCC-CrN disappeared gradually and orth-CrN arised with the increase of VB, and the TS promoted the transformation from FCC - CrN to orth - CrN. The surface morphology of CrN coatings with changed VBs was greatly different, and VB could further improve the mechanical properties of coatings. In this paper, the CrN coating with the parameters (TS =300°C, VB =-30V) had relatively high deposition rate and mechanical properties.

Theoretical Analysis of Chroming Electrolytes and Properties of Chrome Coatings

2020 ◽  
Vol 836 ◽  
pp. 142-150
Author(s):  
Yu.A. Stekolnikov ◽  
S.D. Polischuk ◽  
D.G. Churilov ◽  
N.V. Byshov ◽  
S.N. Borychev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Deposition Rate ◽  
Transition Time ◽  
Internal Stresses ◽  
High Deposition Rate ◽  
Micro Hardness ◽  
Properties Of Coatings ◽  
Current Output ◽  
Low Concentration

According to the dynamic characteristics of the electrochemical system, according to V.F. Molchanov, it is possible to optimize the composition of chroming electrolyte and predict the properties of chromium deposits depending on the mode of deposition and the transition time. The possibility of using the transition time for the formation of the cathode surface colloid-dispersion film to study the chemical composition of the chroming solution is considered. The chemical composition can be optimized by the position of the maxima and minima on the polarization curves. An electrochemical cell can be described as a system by a differential equation, the form of which is determined by its internal structure, which varies with electrolysis conditions. The properties of the system are evaluated by a number of factors: the time of the transition process, forcing, attenuation, and the quality factor. This approach is used to develop a low-concentration chroming electrolyte with organic additives. Analytical dependences of chromium yield on current, micro hardness, roughness and deposition rate on deposition conditions are obtained. Chroming on non-stationary modes allows the most effective influence on the structure and physical-mechanical properties of coatings. When changing electrolysis parameters, it is possible to influence the structure and physical-mechanical properties of coatings, to obtain various functional chromium coatings with specified characteristics (adjustable micro hardness in thickness, porosity, internal stresses, corrosion resistance, wear resistance, roughness) from a single electrolyte. The use of a low-concentration electrolyte together with non-stationary deposition modes makes possible to increase the chromium current yield, covering and dissipative ability of the electrolyte, deposition rate, producibility and environmental friendliness of the process, and to reduce hydrogenation. The electrolyte with crystal violet additives has an increased current output (up to 28 %), an extended range of obtaining wear-resistant coatings up to 240 A / dm2, a high deposition rate of up to 2.5 μm / min, an increased micro hardness by 100-300 kg / mm2, reduced toxicity, a decreased absorbed hydrogen level at 500-700 cm3 per 100 grams of chrome coating and internal stresses at 600-950 kg / mm2.

Control of humping phenomenon and analyzing mechanical properties of Al–Si wire-arc additive manufacturing fabricated samples using cold metal transfer process

2021 ◽  
pp. 095440622199840
Author(s):  
Yashwant Koli ◽  
N Yuvaraj ◽  
Aravindan Sivanandam ◽  
Vipin
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Heat Input ◽  
Large Scale ◽  
High Deposition Rate ◽  
Bead Geometry ◽  
Layer By Layer ◽  
Cold Metal Transfer ◽  
Geometrical Shapes ◽  
Wire Arc Additive Manufacturing

Nowadays, rapid prototyping is an emerging trend that is followed by industries and auto sector on a large scale which produces intricate geometrical shapes for industrial applications. The wire arc additive manufacturing (WAAM) technique produces large scale industrial products which having intricate geometrical shapes, which is fabricated by layer by layer metal deposition. In this paper, the CMT technique is used to fabricate single-walled WAAM samples. CMT has a high deposition rate, lower thermal heat input and high cladding efficiency characteristics. Humping is a common defect encountered in the WAAM method which not only deteriorates the bead geometry/weld aesthetics but also limits the positional capability in the process. Humping defect also plays a vital role in the reduction of hardness and tensile strength of the fabricated WAAM sample. The humping defect can be controlled by using low heat input parameters which ultimately improves the mechanical properties of WAAM samples. Two types of path planning directions namely uni-directional and bi-directional are adopted in this paper. Results show that the optimum WAAM sample can be achieved by adopting a bi-directional strategy and operating with lower heat input process parameters. This avoids both material wastage and humping defect of the fabricated samples.

Parameter Optimization of High Deposition Rate Laser Cladding Based on the Response Surface Method and Genetic Neural Network Model

2021 ◽  
Vol 48 (6) ◽  
pp. 0602112
Author(s):  
庞祎帆 Pang Yifan ◽  
傅戈雁 Fu Geyan ◽  
王明雨 Wang Mingyu ◽  
龚燕琪 Gong Yanqi ◽  
余司琪 Yu Siqi ◽  
...  
Keyword(s):  
Neural Network ◽  
Response Surface ◽  
Response Surface Method ◽  
Deposition Rate ◽  
Network Model ◽  
Parameter Optimization ◽  
Neural Network Model ◽  
High Deposition Rate ◽  
Surface Method ◽  
Genetic Neural Network

Low-loss fibre prepared under high deposition rate by modified c.v.d. technique

1977 ◽  
Vol 13 (20) ◽  
pp. 608 ◽  
Author(s):  
K. Yoshida ◽  
Y. Furui ◽  
S. Sentsui ◽  
T. Kuroha
Keyword(s):  
Deposition Rate ◽  
High Deposition Rate ◽  
Low Loss
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