“…It should be emphasized that in this case, it is very difficult to detect the crystallized Si 3 N 4 using XRD or even SAED techniques [51–53]. The performance of the coating can be enhanced by the coherent interface's ability to successfully stop the motion of dislocations [39]. Figure 5 The cross-section TEM images of the (AlCrNbSiTi)N coating deposited at −150 V. (a) sectional TEM and SAED pattern.…”
Section: Resultsmentioning
confidence: 99%
“…No obvious holes and large particle defects are observed. The coating becomes more compact as the bias rises, which reduces coating thickness and deposition rate [39,40].…”
Section: Morphology and Chemical Composition Analysismentioning
AlCrNbSiTi)N coatings were prepared by arc ion plating at a bias voltage in the range of −50 to −200 V. The as-deposited coatings were all found to have a face-centred cubic structure and exhibit columnar crystal. Si 3 N 4 is distributed in the columnar grains in the form of a network, which separates the columnar grains into fine grains. Si 3 N 4 presents a crystalline state and grows coherently with the surrounding grains to form a nc-(AlCrNbTi)N/nc-Si 3 N 4 nanocomposite structure. The coating with the finest mechanical characteristics was applied at −200 V. The hardness, elastic modulus and wear rate are 34.76, 425 GPa and 0.82 × 10 −9 mm 3 N −1 m −1 , respectively. Based on the outstanding mechanical performance of the coating, it is concluded that the (AlCrNbSiTi)N protective coating has a broad range of potential applications.
“…It should be emphasized that in this case, it is very difficult to detect the crystallized Si 3 N 4 using XRD or even SAED techniques [51–53]. The performance of the coating can be enhanced by the coherent interface's ability to successfully stop the motion of dislocations [39]. Figure 5 The cross-section TEM images of the (AlCrNbSiTi)N coating deposited at −150 V. (a) sectional TEM and SAED pattern.…”
Section: Resultsmentioning
confidence: 99%
“…No obvious holes and large particle defects are observed. The coating becomes more compact as the bias rises, which reduces coating thickness and deposition rate [39,40].…”
Section: Morphology and Chemical Composition Analysismentioning
AlCrNbSiTi)N coatings were prepared by arc ion plating at a bias voltage in the range of −50 to −200 V. The as-deposited coatings were all found to have a face-centred cubic structure and exhibit columnar crystal. Si 3 N 4 is distributed in the columnar grains in the form of a network, which separates the columnar grains into fine grains. Si 3 N 4 presents a crystalline state and grows coherently with the surrounding grains to form a nc-(AlCrNbTi)N/nc-Si 3 N 4 nanocomposite structure. The coating with the finest mechanical characteristics was applied at −200 V. The hardness, elastic modulus and wear rate are 34.76, 425 GPa and 0.82 × 10 −9 mm 3 N −1 m −1 , respectively. Based on the outstanding mechanical performance of the coating, it is concluded that the (AlCrNbSiTi)N protective coating has a broad range of potential applications.
Previous studies have broadly dealt with TiAlSiN coatings that exhibit promising characteristics as surface protective layers for antiwear and antioxidation applications. In this regard, revealing the correlations among coating composition, structure, and properties is vitally important for developing advanced TiAlSiN coatings. The present work addresses the issue by studying the structure and properties of TiAlSiN coatings by tailoring Al/(Al + Ti) ratios. To this end, TiAlSiN coatings are produced by arc deposition with the Al/(Al + Ti) ratios of 0.31, 0.42, 0.51, and 0.62, respectively. The results show that, when the Al/(Al + Ti) ratio ranges from 0.31 to 0.51, the phase structure is mainly TiN phase, and the hardness, wear resistance and oxidation resistance of the films are increased with the rise in the Al/(Al + Ti) ratio. When the Al/(Al + Ti) ratio reaches 0.62, the oxidation resistance of the coating does not improve significantly, while the mechanical and wear properties of the coating are deceased due to the formation of w‐AlN phase. Therefore, the appropriate Al/(Al + Ti) ratio at 0.51 provides overall improvements including mechanical properties, and wear and oxidation resistances under operation conditions. These findings show that optimizing the Al/(Al + Ti) ratio is a promising way to develop TiAlSiN coatings with advanced structure and properties.
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