Resistencia a la Erosión y Corrosión en Caliente - Cerámicos
- Service life:
- Sin la aplicación de este tipo de recubrimiento, no sería posible la operación del componente.
- Wear agent:
- Erosión dinámica por flujo de gases caliente, corrosión por vapores calientes, oxidación.
- Attack effect:
- Pérdida de resistencia estructural por disminución de espesores, ataque corrosivo, oxidación, aumento de transferencia térmica.
- Layer description:
- Genera una barrera de defensa primaria entre la llama o gases calientes y la estructura a la que protege, proporcionando un gradiente térmico compatible con las propiedades físicas del material que se resguarda.
- Layer application:
- Durante el proceso de diseño, se determina que durante la fabricación del elemento se incluya el aporte de un material apto para este funcionamiento, generalmente denominado TBC (Thermal Barrier Coating). Para reemplazar un TBC cuyo ciclo de vida ha concluido.
- Material type:
- Combinación de una super aleación de carácter metálico como primera capa, seguida de una capa cerámica superior.
- Typical location:
- Zonas en contacto con llama directa
Protection against static fretting (contact wear)
- Service life:
- Repair of a used part: the performance of a thermal-sprayed part versus an original one ranges from similar (using a very basic coating material, or one equivalent to the part's original material) up to 2–10 times the service life, by applying high-performance engineering materials.
- Wear agent:
- A harder surface wears and deforms another of lower performance, as a result of the vibrations and oscillating stresses to which the assembly is subjected.
- Attack effect:
- Deformation and loss of geometry. This defect increases mechanical clearances that feed back negatively into the assembly, raising vibration and contact defects, which in turn increase the fretting itself.
- Layer description:
- Geometrically restores the components, making them reusable.
- Layer application:
- When deformation occurs in service. During the design stage it is determined that a material better suited to this function be added during the part's manufacture.
- Material type:
- Steel alloys, high-chromium steels or carbides are generally applied. In very particular cases, ceramic materials may also be used.
- Typical location:
- Rolling-bearing seats. Mechanical interlocks.
Sub-industries & Industries
- Combined-cycle plants - Power Generation
- Simple-cycle plants - Power Generation
- Jet aircraft - Aerospace