Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings

Coatings

Harald Hetzner¹  Christoph Schmid²  Stephan Tremmel¹  Karsten Durst²  Sandro Wartzack¹ 

[1] Engineering Design, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 9, D-91058 Erlangen, Germany; E-Mails:;Physical Metallurgy, Technische Universität Darmstadt, Allarich-Weiss-Straße 2, D-64287 Darmstadt, Germany; E-Mails:

关键词: a-C:H:W;    nanocomposite coating;    design of experiments;    hardness;    Young’s modulus;    H/E ratio;   

DOI  :  10.3390/coatings4040772

来源: mdpi

【 摘 要 】

Tungsten-modified hydrogenated amorphous carbon coatings (a-C:H:W) were deposited on high speed steel by reactive magnetron sputtering of a tungsten carbide target in an argon-ethine atmosphere. The deposition parameters, sputtering power, bias voltage, argon and ethine flow rate, were varied according to a central composite design comprising 25 different parameter combinations. For comparison, a tungsten carbide coating was deposited, as well. During coating deposition, the process variables, total pressure, sputtering voltage and bias current, were measured as process characteristics. The thickness of the deposited coatings was determined using the crater grinding method, and the deposition rate was calculated. Young’s modulus E and indentation hardnessratio, which is an indicator of the wear resistance, can be adapted in a targeted way and with some degree of independence.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.