Determination of the dispersity of metal on Ir/Al2O3 catalyst by thermogravimetry

Liu, Jinxiang; Xie, Yulan; Xiuying, Gao; Yang, Lixin

doi:10.1016/0040-6031(91)80292-q

Cited by 2 publications

(3 citation statements)

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“…Depending on the temperature and the concentration of Mg, the equilibrium partial pressure of O 2 is given by Equation 24,  is the activity coefficient of Mg, x is the Mg concentration, G 22 and G 23 are the standard Gibbs energy changes for reactions 22 and 23, respectively. From thermodynamic data reported in the literature, the par-tial pressure of the residual oxygen for 15 wt.% Mg is in the range of 0.1 Pa.…”

Section: Methodsmentioning

confidence: 99%

“…[20][21][22] Oxidation of aluminum is a more exothermic reaction, and is more favorable than nitridation. Daniel et al 10 found that nitridation is more sensitive than oxidation to reaction temperature and partial pressure of the reactant gas.…”

mentioning

confidence: 99%

“…Scholz and Greil 24 stated that low Si contents favor nitridation. Jinxiang et al 22 investigated the influence of Mg and Si on the rate of nitride formation, underlining the predominant role of magnesium over silicon. Zheng et al 23 have reported successful formation of AlN in an Al-Si melt when processed with ammonia gas.…”

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confidence: 99%

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Aluminum nanocomposites for elevated temperature applications

Borgonovo

Apelian

Makhlouf

2011

JOM

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Research Summary aluminum: cast shop and alloys How would you… …describe the overall signifi cance of this paper? This paper describes a methodology and a conceptual framework to manufacture Al-based nanocomposites in a cost-effective way. It gives a pathway to make nanocomposites directly from melt. …describe this work to a materials science and engineering professional with no experience in your technical specialty? Al-based alloys cannot be used above 285°C as the precipitation hardening mechanism falls apart. Nano-composite Al alloys can be utilized at temperatures above 300°C which gives the opportunity to use them for a variety of elevated temperature applications. …describe this work to a layperson? Diesel engines are quite effective in that energy usage is less. Diesel is quite effective and gets excellent mileage (miles/gallon). However, diesel engines operate at higher temperatures than internal combustion engines. Al alloys fall short for many diesel applications as the Al does not maintain its strength at elevated temperatures. Nanocomposites open up a way for us to use Al for diesel applications.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%