MACHINE WITH ABRADABLE RIDGES AND METHOD.

摘要

Method for making and machine having a fixed part (48) including a portion with a smooth surface, a rotating part (32) configured to rotate relative to the fixed part, the rotating part (32) directly facing the portion of the fixed part (48); and plural ridges (72) formed on the portion of the fixed part (48) directly facing the rotating part (32), the plural ridges (72) being made of an abradable material that is configured to be inoperable at temperatures above 1000 °C.