The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
May. 22, 2003
Ellen Y. Sun, South Windsor, CT (US);
Gary D. Linsey, Glastonbury, CT (US);
John E. Holowczak, South Windsor, CT (US);
Neil R. Baldwin, Lake Forest, CA (US);
Harry E. Eaton, Woodstock, CT (US);
Ellen Y. Sun, South Windsor, CT (US);
Gary D. Linsey, Glastonbury, CT (US);
John E. Holowczak, South Windsor, CT (US);
Neil R. Baldwin, Lake Forest, CA (US);
Harry E. Eaton, Woodstock, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
An article comprises a silicon based substrate, a bond layer and a protective top layer. The top layer is selected from the group consisting of rare earth disilicates, yttrium disilicates, rare earth monosilicates, yttrium monosilicates, silica and mixtures thereof. The protective layer described above is used in combination with a bond layer provided between the protective layer and the silicon based substrate which functions as oxygen getter and includes an oxygen gettering agent. By oxygen gettering agent is meant a refractory metal oxide former which forms an oxide at operational condition of (high temperature and aqueous environment) having a melting point of greater than 1500° C. wherein the negative free energy of formation of the refractory metal oxide from the refractory metal is more than 100 Kcal/mole. Suitable oxygen gettering agents include silicon and other refractory metals. An oxygen gettering agent may also be added to the protective layer.