| 摘要 |
<p>The invention relates to a method of locally repairing parts covered with a thermal barrier consisting of an external ceramic layer (5) and a metallic sub-layer (3) of aluminium-forming alloy which is used to protect the substrate (1) against oxidation and to ensure the adhesion of the external ceramic layer (5). The inventive method is characterised by the following steps: a) the zone to be repaired (6) is marked with a mechanical mask (8) which is adapted to the shape of the part (1) and to the zone to be repaired (6); b) the zone to be repaired (6) is mechanically stripped in order to remove the ceramic, the aluminium layer (3b) and part of the thickness of the sub-layer (3) from said zone; c) the sub-layer is reconstructed (3) in said zone (6) by depositing metals on the partially-stripped part by means of an electrical current; and d) the part is treated thermally so that the metals are diffused in the remaining sub-layer of the zone to be repaired (6) and an aluminium surface film (3b) forms. After the sub-layer has been reconstructed, the zone to be repaired is marked once again with a mechanical mask and a new ceramic layer is deposited on said zone.</p> |
