Titanium based composites and coatings and methods of production

A method of producing a coating for application to a component used at temperatures above about 600° C. and/or in oxidative environments, wherein the method includes the steps of:

• preparing a Ti(Al,O) based composite powder, with each of the powder particles including discrete Al2O3 particles, according to the mechanical milling and thermal treatment method disclosed in PCT/NZ98/00124;
• applying the composite powder produced to a substrate component to produce a composite coating;
• and
• exposing the coated component to a high temperature, oxidative environment above about 600° C. to form a surface oxide layer on the composite coating.

A process for producing a titanium based composite material in a pre-selected form including the steps of:

• preparing a Ti(Al,O) based composite powder with each of the powder particles, including discrete Al2O3 particles, according to the mechanical milling and thermal treatment method disclosed in PCT/NZ98/00124;
• pressing the powder formed into a pre-selected mould to produce a powder compact and sintering the powder compact at a temperature of above about 700° C. under an inert environment;
• exposing the sintered composite material or component to a high temperature, oxidative environment above about 700° C. to form a surface oxide layer;
• wherein the product produced is substantially resistant to oxidation and/or spallation at temperatures above about 600° C.

A method of producing a coating for application to a component used at temperatures above about 600° C. and/or in oxidative environments, wherein the method includes the steps of:

• preparing a Ti(Al,O) based composite powder, with each of the powder particles including discrete TiC, SiC, TiN, TiB2, Y2O3 and/or Si3N4 particles, according to the mechanical milling method disclosed in PCT/NZ98/00124;
• applying the composite powder produced to a substrate component to produce a composite coating;
• and
• exposing the coated component to a high temperature, oxidative environment above about 600° C. to form a surface oxide layer on the composite coating.

A process for producing a titanium based composite material in a pre-selected form including the steps of:

• preparing a Ti(Al,O) based composite powder, with each of the powder particles including discrete TiC, SiC, TiN, TiB2, Y2O3 and/or Si3N4 particles, according to the mechanical milling method disclosed in PCT/NZ98/00124;
• pressing the powder formed into a pre-selected mould to produce a powder compact and sintering the powder compact at a temperature of above about 700° C. under an inert environment;
• exposing the sintered composite material or component to a high temperature, oxidative environment above about 700° C. to form a surface oxide layer;
• wherein the product produced is substantially resistant to oxidation and/or spallation at temperatures above 600° C., preferably between about 600° C. and about 900° C.