Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (1): 1-7.DOI: 10.11890/1006-7191-101-1

• Research paper •     Next Articles

Application of low-emissivity Pt layer on Ni alloy to high temperature

Zhibin HUANG, Wancheng ZHOU,Xiufeng TANG   

  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University,Xi'an 710072, China
  • Received:2009-06-26 Revised:2009-10-13 Online:2010-02-25 Published:2010-02-09
  • Contact: Zhibin HUANG

Abstract:

Platinum films were sputter-deposited on two groups of nickel alloy substrates, in which the first group was the samples with rough surface, and the other group with polished surface. The platinum thin-films were applied to serve as the low-emissivity layers to reflect thermal radiation. Then, the platinum-coated samples were heated in air at 600 ℃ for 200~h to explore the effect of high-temperature environment on the emissivity of coated platinum film. After annealing, the average IR emissivity (at the wavelength of 3-14 μm) of the platinum film was only about 0.1 for polished sample and 0.45 for rough sample. The diffusion between platinum and the nickel-alloy elements at
600 ℃  had been also discussed.

Key words: Low-emissivity layer, Platinum film, Infrared emissivity