Author : Kenzi Tamaru
Release : 2013-06-29
Genre : Science
Kind :
Book Rating : 369/5 ( reviews)

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Dynamic Processes on Solid Surfaces - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Dynamic Processes on Solid Surfaces write by Kenzi Tamaru. This book was released on 2013-06-29. Dynamic Processes on Solid Surfaces available in PDF, EPUB and Kindle. When we see a jumbo jet at the airport, we sometimes wonder how such a huge, heavy plane can fly high in the sky. To the extent that we think in a static way, it is certainly not understandable. In such a manner, dynamics yields behavior quite different from statics. When we want to prepare an iron nitride, for example, one of the most orthodox ways is to put iron in a nitrogen atmosphere under pressures higher than the dissociation pressure of the iron nitride at temperatures sufficiently high to let the nitrogen penetrate into the bulk iron. This is the way thermodynamics tells us to proceed, which requires an elaborate, expensive high-pressure apparatus, sophisticated techniques, and great efforts. However, if we flow ammonia over the iron, even under low pressures, we can easily prepare the nitride-provided the hydrogen pressure is sufficiently low. Since the nitrogen desorption rate is the determining step of the ammonia decomposition on the iron surface, the virtual pressure of nitrogen at the surface can reach an extremely high level (as is generally accepted) because, in such a dynamic system, the driving force of the ammonia decomposition reaction pushes the nitrogen into the bulk iron to form the nitride. Thus, dynamics is an approach considerably different from statics.