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Title: Effects of Silicon Content on the Microstructures and Mechanical Properties of (AlCrTiZrV)-Six-N High-Entropy Alloy Films

Journal Article · · Entropy
DOI: https://doi.org/10.3390/e21010075 · OSTI ID:1614165
 [1];  [2];  [2];  [2];  [2];  [2];  [3]; ORCiD logo [3]
  1. Univ. of Shanghai for Science and Technology, Shanghai (China); DOE/OSTI
  2. Univ. of Shanghai for Science and Technology, Shanghai (China)
  3. Univ. of Tennessee, Knoxville, TN (United States)

A series of (AlCrTiZrV)-Six-N films with different silicon contents were deposited on monocrystalline silicon substrates by direct-current (DC) magnetron sputtering. The films were characterized by the X-ray diffractometry (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and nano-indentation techniques. The effects of the silicon content on the microstructures and mechanical properties of the films were investigated. The experimental results show that the (AlCrTiZrV)N films grow in columnar grains and present a (200) preferential growth orientation. The addition of the silicon element leads to the disappearance of the (200) peak, and the grain refinement of the (AlCrTiZrV)-Six-N films. Meanwhile, the reticular amorphous phase is formed, thus developing the nanocomposite structure with the nanocrystalline structures encapsulated by the amorphous phase. With the increase of the silicon content, the mechanical properties first increase and then decrease. The maximal hardness and modulus of the film reach 34.3 GPa and 301.5 GPa, respectively, with the silicon content (x) of 8% (volume percent). The strengthening effect of the (AlCrTiZrV)-Six-N film can be mainly attributed to the formation of the nanocomposite structure.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); National Science Foundation (NSF); National Nature Science Foundation of China (NSFC)
Grant/Contract Number:
FE0011194
OSTI ID:
1614165
Journal Information:
Entropy, Journal Name: Entropy Journal Issue: 1 Vol. 21; ISSN ENTRFG; ISSN 1099-4300
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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