Multilayer Titanium Nitride Coatings Sand Erosion Protection for Helicopter Compressor Blades and Vanes Aircraft, tank, and helicopter gas • Total coating thickness could be turbine engines are often operated significantly increased at in a desert environment where moderate compressive stress by compressor rotor blades and vanes using a multilayer architecture (24k Type II™) are exposed to erosive media such as sand and dust. These erosive effects • Improved resistance against lead to increased fuel consumption, large particle erosion due to efficiency loss, and damage to multilayer concept compressor and turbine hardware. • Minimizes equipment and Praxair has been applying erosion- production costs and resistant coatings such as TiN, significantly increases production TiCN, TiZrN, TiAIN, and TiAICN speed compared to more applied by cathodic arc physical complex coating compositions vapor deposition (CAPVD) or other physical vapor deposition (PVD) Using a coating composition based processes to prolong the life of on titanium alone without added compressor airfoils in a sand erosion complexity such as alternating environment. layers with different chemistries that require multiple sets of cathodic With the introduction of our unique, arc sources, allowed us to minimize multilayered TiN coating systems, production cost significantly erosion resistance is even greater compared to other coating systems when compared to conventional available in today’s market. monolithic layers. For example, test data shows that our multilayer Erosion testing utilizing different TiN 24k Type 2™ coating for media such as angular alumina, compressor blades increased the large silica particles, and Arizona life of engine compressor blades road dust provides a comprehensive more than threefold in desert sand representation of erosion protection erosion environments. properties, which allows for the optimization of coating architecture 50 Micron Alumina Erosion 60 Advantages for new applications such as large • Substoichiometric coating 50 20 DEG particle erosion. 90 DEG 40 /g Erodent) composition offers improved 3 erosion resistance due to 30 increased hardness, higher 20 toughness, and reduced 10 compressive stress Erosion Rate (10-6 cm 0 Ti-6AI-4V LC-1H CrC SDG2040 WC TiN Multilayer TiN 24k Type II Multilayer Praxair Surface Technologies, Inc. © Copyright 2010 Praxair Technology, Inc. Printed in the United States of America 1500 Polco Street All rights reserved 07-2010 Indianapolis, IN 46222 Praxair and the Flowing Airstream design are trademarks Printed on recycled paper www.praxairsurfacetechnologies.com of Praxair Technology, Inc. in the United States and/or other P-10350 [email protected] countries. Telephone: The information contained herein is offered for use by +1 317 240 2500 technically qualified personnel at their discretion and risk Fax: without warranty of any kind. +1 317 240 2255 C:\Documents and Settings\idyewlc1\My Documents\marketing communications\data sheets\Layout Files\P10350_titanium_nitride_coatings.indd February 1, 2013 10:36 AM page 1.