Abstract: The present invention relates to a method of manufacturing a multiple composition component 10, comprising: arranging first, second and third constituent parts 40, 30, 42 having first, second and third compositions respectively A, B, C so that the first constituent part 40 shares a first boundary with the second constituent part 30 and the second constituent part 30 shares a second boundary with the third constituent part 40. The first, second and third constituent parts 40, 30, 42 are each either a powder or a solid so that the first and second boundaries are each a solid adjacent to a powder. The arrangement is then processed so as to form a single solid component having first, second and third regions 16, 18, 20 having first, second and third compositions A, B, C respectively.

Abstract: A method of assessing the degradation of an oxide-forming coating on a component after a period of operational use of the component, said degradation of the coating being caused by depletion of the oxide-forming element within a remnant coating layer due to inter-diffusion of said element between the remnant coating and both an outer oxide layer and an inner, secondary diffusion layer, wherein a depletion parameter indicative of the depletion of the oxide-forming element in the remnant coating layer varies as a function of the surface roughness of the coated component, the method comprising the steps of: carrying out a non-destructive, quantitative measurement of the surface roughness of the component after said period of operational use; and, based on an estimation of the functional relationship between the surface roughness and the depletion parameter, using the result of said measurement of surface roughness to quantitatively assess the degradation of the coating.

Abstract: The present invention relates to a method of manufacturing a multiple composition component 10, comprising: arranging first, second and third constituent parts 40, 30, 42 having first, second and third compositions respectively A, B, C so that the first constituent part 40 shares a first boundary with the second constituent part 30 and the second constituent part 30 shares a second boundary with the third constituent part 40. The first, second and third constituent parts 40, 30, 42 are each either a powder or a solid so that the first and second boundaries are each a solid adjacent to a powder. The arrangement is then processed so as to form a single solid component having first, second and third regions 16, 18, 20 having first, second and third compositions A, B, C respectively.

Abstract: A method of producing an oxide dispersion strengthened nickel-base superalloy, comprising introducing an oxide dispersoid material into a plasma gun of a plasma spray apparatus, where it is sublimed and turned to vapour; and introducing a nickel-base superalloy material into the plasma spray apparatus at a cooler location, downstream of the plasma gun, such that the oxide dispersoid material condenses on the superalloy material to produce the oxide dispersion strengthened nickel-base superalloy.

Abstract: A single crystal component comprising a first region and a second region. The component comprising a nickel base single crystal superalloy having a gamma phase matrix and gamma prime phase precipitates distributed in the gamma phase matrix. The first region of the component comprises a bi-modal distribution of gamma prime phase precipitates in the gamma phase matrix and the second region of the component comprising a uni-modal distribution of gamma prime phase precipitates in the gamma phase matrix.

Abstract: A method of assessing the degradation of an oxide-forming coating on a component after a period of operational use of the component, said degradation of the coating being caused by depletion of the oxide-forming element within a remnant coating layer due to inter-diffusion of said element between the remnant coating and both an outer oxide layer and an inner, secondary diffusion layer, wherein a depletion parameter indicative of the depletion of the oxide-forming element in the remnant coating layer varies as a function of the surface roughness of the coated component, the method comprising the steps of: carrying out a non-destructive, quantitative measurement of the surface roughness of the component after said period of operational use; and, based on an estimation of the functional relationship between the surface roughness and the depletion parameter, using the result of said measurement of surface roughness to quantitatively assess the degradation of the coating.