Enlargement of the diamond deposition area in combustion flame method by traversing substrate

Ando, Yasutaka; Tobe, Shogo; Saito, Takashi; Sakurai, Jun-ichi; Tahara, Hirokazu; Yoshikawa, Tomohiro

doi:10.1016/j.tsf.2003.12.042

Cited by 14 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 10 which has attracted many efforts until now. [11][12][13][14] Other techniques, such as pulsed laser deposition 15 and shock wave compression, 16 have also been developed. However, improvements on deposition rate and film quality, which strongly depend on the reaction processes, are highly desired.…”

Section: Introductionmentioning

confidence: 99%

Enhanced chemical vapor deposition of diamond by wavelength-matched vibrational excitations of ethylene molecules using tunable CO2 laser irradiation

Líu

Xie

Gao

et al. 2009

Journal of Applied Physics

View full text Add to dashboard Cite

Wavelength-matched vibrational excitations of ethylene ͑C 2 H 4 ͒ molecules using a tunable carbon dioxide ͑CO 2 ͒ laser were employed to significantly enhance the chemical vapor deposition ͑CVD͒ of diamond in open air using a precursor gas mixture of C 2 H 4 , acetylene ͑C 2 H 2 ͒, and oxygen ͑O 2 ͒. The CH 2 -wag vibration mode ͑ 7 ͒ of the C 2 H 4 molecules was selected to achieve the resonant excitation in the CVD process. Both laser wavelengths of 10.591 and 10.532 m were applied to the CVD processes to compare the C 2 H 4 excitations and diamond depositions. Compared with 10.591 m produced by common CO 2 lasers, the laser wavelength of 10.532 m is much more effective to excite the C 2 H 4 molecules through the CH 2 -wag mode. Under the laser irradiation with a power of 800 W and a wavelength of 10.532 m, the grain size in the deposited diamond films was increased by 400% and the film thickness was increased by 300%. The quality of the diamond crystals was also significantly enhanced.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced chemical vapor deposition of diamond by wavelength-matched vibrational excitations of ethylene molecules using tunable CO2 laser irradiation

Líu

Xie

Gao

et al. 2009

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Figure 12 shows the results of the wear-resistant test of the APS molybdenum coating and diamond/molybdenum hybrid coatings deposited on molybdenum and 304 stainless steel substrates by the single welding torch equipment and the twin welding torch equipment. In our previous study (Ref [4][5][6], it was proven that wear-resistant property was promoted by addition of diamond particles. Also in this study, almost the same wear resistance, which was 1.5 times higher than that of the APS molybdenum coating, was indicated in any hybrid coatings.…”

Section: Effects Of Twin Welding Torch On Diamondmentioning

confidence: 99%

High-Rate Diamond Deposition by Combustion Flame Method Using Twin Acetylene/Oxygen Gas Welding Torch

2009

Self Cite

View full text Add to dashboard Cite

To develop a high-rate diamond deposition process using combustion flame method, diamond deposition equipment with twin acetylene/oxygen welding torch was manufactured, and diamond deposition by using this equipment was carried out. 304 Stainless steel plates and molybdenum plates were used as substrates. The diamond deposition was conducted under the following conditions: oxygen flow rate: 1.25 SLM, acetylene/oxygen flow ratio: 1.15, and diamond deposition temperature: around 1473 K. Consequently, diamonds could be deposited even on the stainless steel substrate, and diamond deposition rate was promoted by using twin torch equipment. Besides, the diamond/molybdenum hybrid coating using diamonds deposited by twin torch equipment have the same wear-resistant property as that using diamonds by the single torch equipment. From these results, this technique was thought to have high potential for high-rate diamond deposition in combustion flame method.

show abstract

“…It has various advantages over other methods, such as high synthesis speed and the safety and low cost of the equipment used; these advantages are desirable in the industrial market. In the combustion flame method, the enlargement of the area of the synthesized diamond [5], the synthesis of large single-crystal diamond [6] and the synthesis of diamond films for application in electronic devices [7] have been investigated. However, to date, the factors affecting diamond synthesis remain to be determined and no means of precisely controlling this method has yet been established.…”

Section: Introductionmentioning

confidence: 99%

Step Synthesis Method for Diamond Films on Tungsten Carbide Substrate Surface by Combustion Flame

Takahashi

Kamiya

Ohyoshi

2011

Int.J.Soc.Mater.Eng.Resour.

View full text Add to dashboard Cite

A combustion flame method enables the synthesis of diamond using acetylene-oxygen gas (C 2 H 2 /O 2 ) combustion flame in ambient air. Recently, tungsten carbide (WC) is used as cutting tools in the machining industry. In this study, diamond films were synthesized by combustion flame on WC surfaces. However, it was difficult to synthesize the diamond films on the WC substrate surfaces. Therefore, in order to synthesize the diamond film, a two-step synthesis method was proposed. In this method, the film surface temperature and the distance of the flame inner cone from the surface for each step are changed during the synthesis. The first step was setting the film temperature to 1273 K, the second step was setting to 1223 K. The distance of the flame inner cone from the surface was changed for each step (Case 1 ; the first step : d = 7.0 mm, the second step : d = 7.0 mm, Case 2 ; the first step : d = 7.0 mm, the second step : d = 7.5 mm, Case 3 ; the first step : d = 7.5 mm, the second step : d = 7.0 mm). In the Case 1 and 2, the delamination-free film was synthesized on the WC surfaces, and diamonds were synthesized. However, in the Case 3, the film delamination occurred, and good diamond films were not synthesized.

show abstract

Enlargement of the diamond deposition area in combustion flame method by traversing substrate

Cited by 14 publications

References 8 publications

Enhanced chemical vapor deposition of diamond by wavelength-matched vibrational excitations of ethylene molecules using tunable CO2 laser irradiation

Enhanced chemical vapor deposition of diamond by wavelength-matched vibrational excitations of ethylene molecules using tunable CO2 laser irradiation

High-Rate Diamond Deposition by Combustion Flame Method Using Twin Acetylene/Oxygen Gas Welding Torch

Step Synthesis Method for Diamond Films on Tungsten Carbide Substrate Surface by Combustion Flame

Contact Info

Product

Resources

About