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Thermal plasma synthesis of titanium...

Tong, Lirong.

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Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders./
作者:	Tong, Lirong.
面頁冊數:	146 p.
附註:	Adviser: Ramana G. Reddy.
Contained By:	Dissertation Abstracts International67-07B.
標題:	Engineering, Materials Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3223328
ISBN:	9780542760730

Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders.
Tong, Lirong.

Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders. - 146 p.

Adviser: Ramana G. Reddy.

Thesis (Ph.D.)--The University of Alabama, 2006.

In-situ synthesis of TiC-Al (Ti) nanocomposite powders was systematically investigated using a non-transferred direct current (D. C.) plasma technology. A mixture of metal Al and Ti was used as a starting material and a mixture of methane and argon was used as a reactant and carrier gas.

ISBN: 9780542760730Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders.
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100 1 $a Tong, Lirong. $3 1297137
245 1 0 $a Thermal plasma synthesis of titanium carbide-aluminum (titanium) nanocomposite powders.
300 $a 146 p.
500 $a Adviser: Ramana G. Reddy.
500 $a Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4079.
502 $a Thesis (Ph.D.)--The University of Alabama, 2006.
520 $a In-situ synthesis of TiC-Al (Ti) nanocomposite powders was systematically investigated using a non-transferred direct current (D. C.) plasma technology. A mixture of metal Al and Ti was used as a starting material and a mixture of methane and argon was used as a reactant and carrier gas.
520 $a Thermodynamic analysis was carried out using a computer program HSC based on Gibbs energy minimization method to predict the possible starting materials and conditions of synthesizing TiC-Al (Ti) nanocomposite powders. The analytical results showed that it is thermodynamically feasible to produce TiC-Al (Ti) nanocomposite powders using Al and Ti as starting materials and CH4 as reacting gas in a thermal plasma environment. To avoid carbon in the product particles, the molar ratio of CH4: Ti (Al) should be less than 0.7:1.
520 $a A simulation was performed using Fluent 6.1 to describe temperature profile, flow field and methane distribution in the plasma reactor. The simulation results were applied to optimize feeding rate, input power and other processing parameters of TiC-Al (Ti) nanocomposite powders by thermal plasma technology, and to predict the materials that could be used as starting materials. The simulation results indicated that Al2O3 particles of more than 30 mum could not be completely vaporized; Ti and Al particles of less than 45 mum could be vaporized at the input power of 20 kW and the injection velocity of 10m/s. Therefore, Al2O3 particles could not be used as a starting material, while Ti and Al particles of less than 45 mum can be used as starting materials.
520 $a The experimental feasibility and processing parameters of TiC-Al (Ti) nanocomposite powders were systemically investigated. The product powders were characterized using SEM, EDS, TEM, XRD and BET methods for particle size, composition and morphology. The experimental and calculation results showed that it is technically feasible to synthesize TiC-Al (Ti) nanocomposite powders using Al and Ti as starting materials and CH4 as reacting gas in a thermal plasma environment. TiC-Al (Ti) nanocomposite powders (core shell microstructure) were successfully synthesized. The product particle size increased with the distance from the reactor.
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791 $a Ph.D.
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