Title:
離散した付加的な保護コーティングを施した高温合金物品およびその製造方法
Document Type and Number:
Japanese Patent JP3973171
Kind Code:
B2
Abstract:
An environmental resistant spot type coating is provided on a selected, discrete surface area of a high temperature operating article, by applying to the area a layer of at least one of the elements selected from Pt, Rh and Pd, and preferably Pt, to a thickness of about 0.0002'' to less than 0.0006'' and an average distribution of at least about 0.07 grams per square inch. The layer is heated at about 1800-2050 DEG F. for about +E,fra 1/2+EE -4 hours to diffuse the element with the surface area. Then the layer is aluminided to provide an average total coating thickness of about 0.001-0.005''. The article provided includes an environmental resistant additive coating diffused with the selected discrete area. The coating comprises an outer portion of at least about 17 wt. % of the selected element, and an aluminide of the surface area or substrate. In one form, the outer portion is a two phase outer portion: a first phase of an aluminide of the selected element at a content of at least about 40 wt. % interspersed with a second phase comprising an aluminide in which Al is at least about 20 wt. %. Between the outer portion and the surface area is an inner portion which is a diffusion zone comprising diffused selected element along with an aluminide and/or elements diffused from the surface area.
Inventors:
Warren Davis Gross Klaus, Junior
Richard Roy Worthing, Junior
Richard Roy Worthing, Junior
Application Number:
JP3612397A
Publication Date:
September 12, 2007
Filing Date:
February 20, 1997
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
C23C10/48; C23C10/58
Domestic Patent References:
| JP5311391A | ||||
| JP57155364A | ||||
| JP54047836A | ||||
| JP5247569A | ||||
| JP51144345A |
Foreign References:
| WO1995023243A1 |
Attorney, Agent or Firm:
Kenichi Matsumoto