Abstract:
An apparatus for applying ceramic coatings using an electron beam-physical vapor deposition apparatus is described. The apparatus includes means for introducing the anionic constitutent of the ceramic into a coating chamber and means for confining the anionic constituent about the component to be coated during the coating process.
Abstract:
Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed by one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.
Abstract:
A method for applying ceramic coatings using electron beam - physical vapor deposition techniques is described. The method includes the step of introducing the anionic constituent of the ceramic into a coating chamber and confining the anionic constituent about the component to be coated during the coating cycle.
Abstract:
Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed by one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.
Abstract:
Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed by one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.
Abstract:
Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed by one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.
Abstract:
Coated article and method for producing the coated article. The article (1) is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer (2) is applied to the article to be protected and a columnar grain ceramic (5) is applied by vapor deposition to the MCrAlY coated article. An alumina layer (4) which exists between the MCrAlY layer (2) and the columnar ceramic layer (5) provides for the adherence of the columnar layer to the MCrAlY layer. An important feature of the invention is that the interface (3) between the MCrAlY layer and the alumina layer has a low surface roughness and this greatly improves the columnar ceramic layer adherence.
Abstract:
An apparatus for applying ceramic coatings using an electron beam-physical vapor deposition apparatus is described. The apparatus includes means for introducing the anionic constitutent of the ceramic into a coating chamber and means for confining the anionic constituent about the component to be coated during the coating process.
Abstract:
An apparatus for applying ceramic coatings using an electron beam - physical vapor deposition apparatus includes means 26, 28 for introducing the anionic constitutent of the ceramic into a coating chamber and means such as chamber 56 for confining the anionic constituent about the component to be coated during the coating process. The animic constituent may be oxgyen or nitrogen and the ceramic coating could be for example titanium nitride or zirconium oxide.