Pulverulent material for abradable seal

摘要

Pulverulent material comprises mainly aluminum and contains manganese or calcium. 5-20 weight % of the metallic powder comprises manganese or calcium. The material additionally contains 5-15 weight % organic powder and 5-20 weight % ceramic powder. The material may contain one or more additional metallic elements selected from chromium, molybdenum, nickel, silicon and iron and representing at most 10 wt.% of the weight of the metallic powder. The metallic powder represents 65-90 wt% of the material.