The Study Of Metal Material In Aluminium Piston Thermal Barrier Coatings

The article discuss on the intcrmetallics in heat barrier layer of aluminium pistonTBCs and making skill By phase picturc,expansivity and unit cell parametar,i ntcrmetallics is chosen in the experiment; In order to prevent activc metal to be oxidized at high temperatur c I chose sintering process in vacuum to make intcrmet aLlics; Searching the skill of surface coating,I conti nute to select plasma spraying to make the heat barrie r layer;Analyzing inner coat and the associative coat of coat and the surface of aluminium alloy basal baby I can draw an conclusion: the structure of ThCs is basal baby+passage beds+working lining. Puting the made coat to heat shock test, it demons trate the bonding strength of coat is better Using met allographical microcope~ stereoscan electronic probe a nd X-ray to analyize the associative way of coat,Lt is main between passage beds.At the same time,it exists t he machenic association and physical association.There is the phenomenon of complementary soluting in the par tides of working lining. Using X-ray to analyze, it can be certain on the surface that it creats intermeta llics which exists it solid solution and it is feasibl e to make use of sintering process in vacuum. From abc ye, Jf five yuan/AlNi heat barrier layer is sprayed to the piston in Mortor tested 1000 kilometers on the roa d, the coat is not destroyed.