Analysis of the FCAW deposition process of a chromium carbide alloy applying central composite circumscribed experimental design

2018 ◽  
Vol 32 (9) ◽  
pp. 579-587
Author(s):  
Gustavo Medeiros Souza do Nascimento ◽  
Anderson Geraldo Marenda Pukasiewicz
Keyword(s):  
Experimental Design ◽  
Chromium Carbide ◽  
Deposition Process ◽  
Carbide Alloy ◽  
Central Composite

The Chemical Vapor Deposition of Dispersed Phase Composites in the B-Si-C-H-Cl-Ar System

1994 ◽  
Vol 363 ◽  
Author(s):  
T. S. Moss ◽  
W. J. Lackey ◽  
G. B. Freeman
Keyword(s):  
Experimental Design ◽  
Vapor Deposition ◽  
Multivariate Regression ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Response Surfaces ◽  
Dispersed Phase ◽  
Designed Experiment ◽  
Cell Volumes ◽  
Central Composite

AbstractThe CVD of the coatings in the B-Si-C-H-C1-Ar system was accomplished using a statistically designed experiment. The experimental design used five factor half-fraction factorial with a central composite design that was both rotatable and orthogonal. Deposits were thick and dense and were composed of B13C2 and β-SiC with compositions ranging from 0 to 100%. Response surfaces were generated using multivariate regression for unit cell volumes of B13C2 and β-SiC, %B13C2/%SiC in the coating, and the Si to B ratio in the deposit. These equations could then be used to examine the significant variables in the reaction, as well as for tailoring and optimizing the deposition process.

Optimized screen-printing and SEM-FIB characterization of YSZ thin films for Solid Oxide Fuel Cells and gas sensors devices

2004 ◽  
Vol 822 ◽  
Author(s):  
A. Morata ◽  
A. Tarancón ◽  
G. Dezanneau ◽  
F. Peiró ◽  
J. R. Morante
Keyword(s):  
Experimental Design ◽  
Screen Printing ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Deposition Process ◽  
Technological Parameters ◽  
Significant Information ◽  
Screen Printing Technique ◽  
Final Porosity

AbstractIn the present work, the screen printing technique has been used to deposit thick films of Zr0.84Y016O1.92 (8YSZ). In order to control the final porosity in view of a specific application (SOFCs or gas sensor), an experimental design based on analysis of variances (ANOVA) has been carried out. From this, we were able to determine the influence of several technological parameters on films porosity and grain size. The films obtained have been analysed with both Scanning Electron Microscopy (SEM) and Focused Ion Beam (FIB) combined with SEM. We show that only the combination of experimental design and advanced observation technique such as Focused Ion Beam allowed us to extract significant information for the improvement of the deposition process.

Supramolecular solvent-based microextraction method for cobalt traces in food samples with optimization Plackett–Burman and central composite experimental design

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 94879-94886 ◽  
Author(s):  
Funda Aydin ◽  
Erkan Yilmaz ◽  
Mustafa Soylak
Keyword(s):  
Experimental Design ◽  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Optimization Method ◽  
Food Samples ◽  
Flame Atomic Absorption ◽  
Supramolecular Solvent ◽  
Central Composite Experimental Design ◽  
Central Composite

A new microextraction method based on formation of supramolecular solvent (Ss) was developed by using of chemometric optimization method for cobalt determination with microsampling flame atomic absorption spectrometry (MS-FAAS).

Optimization of Linoleic Acid Monoepoxidation Condition from Malaysian Jatropha curcas Using Central Composite Design (CCD)

2015 ◽  
Vol 754-755 ◽  
pp. 1107-1112
Author(s):  
Rozaini Abdullah ◽  
Jumat Salimon ◽  
Anis Atikah Ahmad
Keyword(s):  
Linoleic Acid ◽  
Reaction Time ◽  
Experimental Design ◽  
Central Composite Design ◽  
Reaction Temperature ◽  
Jatropha Curcas ◽  
Catalyst Loading ◽  
Time Saving ◽  
Independent Variable ◽  
Central Composite

The aim of this study was to optimize the monoepoxidation process of linoleic acid obtained from Malaysian Jatropha curcas oil using central composite design (CCD). There were four independent variable factors had been studied which involved reaction temperature (X1), reaction time (X2), catalyst loading (X3) and H2O2 concentration (X4). Thirty experiments were carried out based on the experimental design responses obtained. The results showed that the optimum condition was obtained at catalyst loading of 0.11% (w/w) methyltrioxorhernium (VII) (MTO), H2O2 mole of 99%, reaction temperature of 58.41oC for 5 hours. The central composite design was proven to be simpler method, time saving and required less samples compared to the conventional method.

Optimization of Critical Medium Components for the Expression of Recombinant Human Transferrin in Insect Cells Baculovirus System

2012 ◽  
Author(s):  
Clarence M. Ongkudon ◽  
Badarulhisam Abdul Rahman ◽  
Azila Abd. Aziz
Keyword(s):  
Response Surface Methodology ◽  
Experimental Design ◽  
Central Composite Design ◽  
Response Surface ◽  
Insect Cells ◽  
Expression System ◽  
Proliferating Cells ◽  
Human Transferrin ◽  
Lipid Mixtures ◽  
Central Composite

Transferin manusia (hTf) memainkan peranan yang penting dalam fungsi bakteriostatik dan pengangkutan ferum dari bahagian penyimpanan ke sel–sel yang membiak melalui proses endositosis janaan reseptor. Sistem ekspresi bakulovirus sel serangga telah dipakai secara meluas sebagai sistem alternatif dalam penghasilan Transferin manusia rekombinan (rhTf). Kajian ini ditumpukan ke atas pengoptimuman glutamina, glukosa dan campuran lipid 1000x yang dapat meningkatkan penghasilan rhTf. Reka bentuk eksperimen yang melibatkan 17 eksperimen reka bentuk komposit berpusat (CCD) telah digunakan dan hasil kajian dianalisis oleh Statistika (Statsoft v. 5.0). Metodologi permukaan tindak balas (RSM) telah mengenalpasti nilai optimum parameterparameter yang dikaji iaitu glutamina=2211.20 mg/L, glukosa=1291.95 mg/L, dan campuran lipid 1000x=0.64 %v/v. Hasil optimasi menunjukkan peningkatan hasil rhTf sebanyak tiga kali ganda, iaitu daripada 19.89 μg/ml kepada 65.12 μg/ml. Kata kunci: Transferin manusia; bakulovirus sel serangga; reka bentuk eksperimen; reka bentuk komposit berpusat; metodologi permukaan tindak balas Human Transferrin (hTf) plays a big role in providing bacteriostatic functions as well as to transport iron from the storage part to all proliferating cells by receptor mediated endocytosis. Insect cells baculovirus expression system has been widely used as an alternative expression system for the production of recombinant human Transferrin (rhTf). This work focused mainly on the optimization of glutamine, glucose and lipid mixtures 1000x to increase rhTf yield. An experimental design involving 17 central composite design (CCD) experiments was employed and results were analyzed by Statistica (Statsoft v. 5.0). The response surface methodology (RSM) had identified the optimum values where glutamine=2211.20 mg/L, glucose=1291.95 mg/L, and lipid mixtures 1000x=0.64 %v/v. Using the optimized parameters, the studies demonstrated an increase in the rhTf yield by three–fold from 19.89 μg/ml to 65.12 μg/ml. Key words: Human transferrin; insect cells baculovirus; experimental design; central composite design; response surface methodology

316L Stainless Steel Sensitization in Carbon Nanotube CVD Growth for Bacterial Resistance

2020 ◽  
Author(s):  
Sterling Voss ◽  
Bret Mecham ◽  
Lucy Bowden ◽  
Jacquelyn Monroe ◽  
Anton E. Bowden ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Chromium Carbide ◽  
316L Stainless Steel ◽  
Bacterial Resistance ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Carbide Formation ◽  
Biofilm Growth ◽  
The Matrix

Abstract Physically altering the micro-topography of a surface can dramatically affect its capacity to support or prevent biofilm growth. Growing carbon-infiltrated carbon nanotubes on biomedical materials is one such approach which has proven effective. Unfortunately, the high temperature and carbon-rich gas exposure required for this procedure has proven to have deleterious effects. This paper proposes a kinetic model to explain the rusting phenomenon observed on 316L stainless steel substrates which have undergone the chemical vapor deposition process to grow carbon-infiltrated carbon nanotubes. The model is derived from Fick’s Second Law, and predicts the growth of chromium carbide as a function of temperature and time. Chromium carbide formation is shown to be the mechanism of corrosion, as chromium atoms are leeched from the the matrix, preventing the formation of a passivating chromium oxide layer in place of problematic iron oxide (rust) formation. The model is validated using experimental methods, which involve immersion in bacteria culture, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX).

Evaluation of methyl chavicol concentration by different evaporation processes using central composite experimental design

2012 ◽  
Vol 98 ◽  
pp. 464-471 ◽  
Author(s):  
Patricia Fazzio Martins ◽  
Claudio Carmona ◽  
Edgar Leonardo Martinez ◽  
Paula Sbaite ◽  
Rubens Maciel Filho ◽  
...  
Keyword(s):  
Experimental Design ◽  
Methyl Chavicol ◽  
Central Composite Experimental Design ◽  
Central Composite

Experimental Design in Analytical Chemistry—Part I: Theory

2014 ◽  
Vol 97 (1) ◽  
pp. 3-11 ◽  
Author(s):  
Heshmatollah Ebrahimi-Najafabadi ◽  
Riccardo Leardi ◽  
Mehdi Jalali-Heravi
Keyword(s):  
Analytical Chemistry ◽  
Response Surface Methodology ◽  
Experimental Design ◽  
Response Surface ◽  
Fractional Factorial ◽  
Factorial Designs ◽  
Fractional Factorial Designs ◽  
Central Composite

Abstract This paper reviews the main concepts of experimental design applicable to the optimization of analytical chemistry techniques. The critical steps and tools for screening, including Plackett-Burman, factorial and fractional factorial designs, and response surface methodology such as central composite, Box-Behnken, and Doehlert designs, are discussed. Some useful routines are also presented for performing the procedures.

Some properties of chromium carbide alloy powders

1987 ◽  
Vol 26 (10) ◽  
pp. 777-781
Author(s):  
V. N. Klimenko ◽  
V. A. Maslyuk ◽  
V. S. Kindysheva ◽  
L. V. Strashinskaya ◽  
T. I. Shaposhnikova
Keyword(s):  
Chromium Carbide ◽  
Carbide Alloy
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