High Temperature Volatility and Oxidation Measurements of Titanium and Silicon Containing Ceramic Materials

Title:	High Temperature Volatility and Oxidation Measurements of Titanium and Silicon Containing Ceramic Materials
Author:	Nguyen, QuynhGiao N.
Description:	Titanium (Ti) and silicon (Si) containing materials are of high interest to the aerospace industry due to its high temperature capability, strength, and light weight. A continuous exterior oxide layer is desirable to reduce the oxidation rate of these two materials. At high temperatures, water vapor plays a key role in the volatility of materials including oxide surfaces. This study first evaluated several hot-pressed Ti and Si-containing compositions at high temperatures as a function of oxidation resistance. This study also evaluated cold pressed titanium dioxide (TiO2) powder pellets at a temperature range of 1400°C - 1200°C in water containing environments to determine the volatile hydoxyl species using the transpiration method. The water content ranged from 0-76 mole % and the oxygen content range was 0-100 mole % during the 20-250 hour exposure times. Results indicate that oxygen is not a key contributor at these temperatures and a volatile Ti-O-H species has been identified.
Permanent Link:	http://rave.ohiolink.edu/etdc/view?acc_num=csu1239291812 http://hdl.handle.net/2374.OX/104956
Date:	2008

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