Research on the growth state and performance of diamond coatings based on different carbon source concentration and temperature

Author(s):  
Feng Lu ◽  
Zhengwei Fu ◽  
Xu Bai ◽  
Tianen Hao ◽  
Tianwei Liu ◽  
...  
2011 ◽  
Vol 204-210 ◽  
pp. 1691-1696
Author(s):  
Yu Qiang Chen ◽  
Jiang Wei Lv ◽  
Hong Wei Jiang ◽  
Hong Yan Peng ◽  
Yu Jie Feng ◽  
...  

A set of boron-doped diamond (BDD) electrodes were deposited on silicon substrates by direct current plasma chemical vapor deposition (DC-PCVD) system using different carbon source concentrations. The influence of carbon source concentration on characterization of BDD electrodes was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and phenol degradation. It was found that BDD films with different carbon source concentrations were polycrystalline films with (111) dominant orientation. The films grew well when carbon source concentration was less than 2.5%, while graphite phase began to form when carbon source concentration was increased to 3%. Boron atoms were located at the substitutional site or interstitial sites in the crystalline lattice of diamond films, and didn’t damage the structure of diamond crystal. Within 4 h, 100 mg/L phenol solution in 80 ml could be oxidized by all the electrodes with removal efficiency higher than 90%.


2011 ◽  
Vol 233-235 ◽  
pp. 1920-1923
Author(s):  
Shuai Ran Li ◽  
Jun Feng Dou ◽  
Li Rong Cheng ◽  
Ai Zhong Ding ◽  
Lin Jiang ◽  
...  

This is the report describing the biodegradation of benzo[a]pyrene (BaP) by strains isolated from the soil of the PAH contaminated sites. Achromobacter sp and Alcaligenes sp were found with the capability of degrading Bap as sole carbon source, their biodegradation performance of BaP was evaluated when the initial BaP concentrations was approximately 0.25mg/L, 0.40mg/L and 0.90mg/L. The results demonstrated Alcaligenes sp could degrade Bap completely within two weeks when the initial Bap concentration was 0.40mg/L. Alcaligenes sp showed higher removal efficiency than Achromobacter sp.


2019 ◽  
Vol 109 (01-02) ◽  
pp. 35-39
Author(s):  
E. Uhlmann ◽  
W. Reimers ◽  
K. Brömmelhoff ◽  
G. Christiansen

Das Bearbeiten von Leichtbauwerkstoffen wie kohlefaserverstärkter Kunststoff (CFK) stellt aufgrund der hohen Anforderungen an die Werkstückqualität bei gleichzeitig hohem Werkzeugverschleiß eine Herausforderung für die Zerspanung dar. Für diesen Anwendungszweck wurden Bohrwerkzeuge mit verschiedenen CVD-Diamantbeschichtungen sowie Hartmetallsubstraten getestet und analysiert. Es wird die Bearbeitung von CFK wirtschaftlicher gestaltet. Die Prozesssicherheit und Leistungsfähigkeit wird gesteigert.   The machining of novel lightweight materials such as carbon fiber reinforced plastic (CFRP) is a challenge due to the high requirements regarding the workpiece quality while high tool wear occurs. For this purpose, drilling tools with different CVD diamond coatings and carbide substrates were tested and analyzed. The processing of CFRP is made more economical and the process reliability and efficiency are increased.


2018 ◽  
Vol 141 ◽  
pp. 9-18 ◽  
Author(s):  
Gang Guo ◽  
Di Wu ◽  
George A. Ekama ◽  
Tianwei Hao ◽  
Hamish Robert Mackey ◽  
...  

2013 ◽  
Vol 67 (8) ◽  
pp. 1802-1808 ◽  
Author(s):  
Jun-Xian Liu ◽  
Qin-Yan Yue ◽  
Bao-Yu Gao ◽  
Yan Wang ◽  
Qian Li ◽  
...  

In this paper, potato starch wastewater as culture medium was treated by the oleaginous yeast Lipomyces starkeyi to biosynthesize microbial lipid. The result indicated that carbon source types, carbon source concentration, nitrogen source types, nitrogen source concentration, inoculum size, and cultivation time all had a significant effect on cell growth and microbial lipid accumulation in batch cultures. A measure of 120 g/L of glucose concentration, 3.0 g/L of (NH4)2SO4 concentration, 10% inoculum size, and incubation time 96 h cultivated in a shaking flask at 30 °C were found to be the optimal conditions not only for cell growth but also for lipid synthesis. Under this condition, the cellular biomass and lipid content could reach 2.59 g/L and 8.88%, respectively. This work provides a new method for effective utilization of potato starch wastewater, which has particular social and economic benefits for yeast treatment technology.


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