Process Description
Honeycomb is used as a sealing device on the stationary component of a dynamic system. In gas paths, honeycomb provides an effective method to prevent leakage, thereby promoting gas path efficiency. At the same time, it minimizes damage to the rotating component in case of incursion. They are a common method of clearance control in turbine engines.

Honeycombs can be made from a wide range of metals, which allows them to be used in all sections of the turbine engine. In addition, the size of the honeycomb cell can be tailored to meet specific requirements. They are traditionally brazed to the stationary component.

In addition, honeycomb can be filled with a sintered powder. This provides additional support to the honeycomb walls to counteract fatigue failure and acts as a thermal barrier between the top surface of the honeycomb and the support segment. The aluminum content of the sinter fill powder provides a reservoir that forms aluminum oxide on the honeycomb foil, which provides oxidation protection at high temperatures.

Features of Honeycomb Seals
• Lightweight, effective clearance control method
• Wide variety of material compositions, cell sizes, and dimensions to meet specific requirements
• Increase gas path efficiency
• Minimizes damage to rotating components
• Can be used at all service temperatures