Damping properties of a novel porous Mg–Al alloy coating prepared by arc ion plating

2014 ◽  
Vol 238 ◽  
pp. 139-142 ◽  
Author(s):  
Du Guangyu ◽  
Tan Zhen ◽  
Ba Dechun ◽  
Liu Kun ◽  
Sun Wei ◽  
...  
2017 ◽  
Vol 46 (5) ◽  
pp. 1188-1191 ◽  
Author(s):  
Du Guangyu ◽  
Tan Zhen ◽  
Ba Dechun ◽  
Liu Kun ◽  
Han Qingkai

Coatings ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 20 ◽  
Author(s):  
Guangyu Du ◽  
Zhen Tan ◽  
Guohao Li ◽  
Dechun Ba ◽  
Kun Liu

Author(s):  
M Pal

The marine environment is hostile to most engineering materials, a combination of in-service wear and exposure to marine environment leads to an accelerated material degradation.  Insufficient or poor protection of the substrates further assists the accelerated material degradation in marine environment. There is a direct relationship between the material-state of a ship and its operational capability, readiness, and service life.  The current state-of-the-art practice is to use paint-based coatings to maintain the material-state of ships.  However, the protection offered by paint coatings is usually brief due to inherent permeability and low damage tolerance of these coatings.  For this reason, the paint coatings require renewal at regular intervals, typically less than 5-years, to maintain a minimum level of protection from the marine environment.  The need for regular painting of ships results in a significant negative impact on the through-life availability, operational capability/readiness, and the cost of maintenance/operation of naval ships.  Therefore, the fleet owners and operators should look beyond the conventional paint-based coatings to achieve significant breakthrough improvements in maintaining and enhancing the material-state of naval ships. Metallic coatings, if selected and applied appropriately, will outperform the paint coatings in the marine environment.  Historically, the cost and performance of metallic coatings, mainly thermal metal spray (TMS) coatings, prevented their widespread use in the marine industry.  The TMS coatings also have their own inherent application and performance related limitations that are widely reported in the literature.  However, the cold metal spray (CMS) coating process can overcome the application and performance related limitations that are typically associated with the TMS coatings, therefore creating an opportunity for widespread use of metallic coatings in shipbuilding and fleet upkeep/maintenance. In this paper, the ability of low-pressure (LP-CMS) coatings to repair and reclaim damaged marine components, and application of functional coatings to improve in-service damage tolerance of the damaged/new components is investigated.  The results of the investigation show that two LP-CMS coatings, Al-alloy and CuZn-alloy, can be used to repair and preserve both new and damaged components.  The accelerated salt-spray and natural immersion corrosion testing of the LP-CMS coatings showed that each coating will be better suited to a particular operational environment, i.e. CuZn-alloy coating performed well in both immersion and atmospheric corrosion environments, whereas Al-alloy coating performed well only in atmospheric corrosion environment. 


Vacuum ◽  
2021 ◽  
pp. 110152
Author(s):  
Lijun Xian ◽  
Haibo Zhao ◽  
Guang Xian ◽  
Chencheng Wang ◽  
Hong He

Rare Metals ◽  
2016 ◽  
Vol 36 (11) ◽  
pp. 858-864 ◽  
Author(s):  
Jin-Long Li ◽  
Gang-Yi Cai ◽  
Hua-Sheng Zhong ◽  
Yong-Xin Wang ◽  
Jian-Min Chen

2011 ◽  
Vol 306-307 ◽  
pp. 274-279
Author(s):  
Qing Tao ◽  
Yan Wei Sui ◽  
Sun Zhi ◽  
Wei Song

AlN and TiN thin films are widely used in electronic devices and acoustic material and other fields because of its unique merit, the preparation of nitride thin films by using the arc ion plating has not been a systematic and deep study. The article presents our research procedure which the AlN and TiN thin films are deposited on stainless steel substrate by arc ion plating (AIP). The characteristics of thin films, for example microstructure, morphology, composition analysis and hardness, are examined and analyzed. The results showed that: Droplet-like particles appear in the microstructure of nitride thin films, and the grain size of droplet-like particles in AlN thin films is greater than in TiN thin films. The micro-hardness of nitride films preparation in experiment has improved significantly, and establish firmly basic for extending the application field of nitride film.


2021 ◽  
pp. 109476
Author(s):  
Jiaojiao Wu ◽  
Mingli Shen ◽  
Ming Hu ◽  
Cean Guo ◽  
Qiang Li ◽  
...  

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 841
Author(s):  
Yanmei Liu ◽  
Tie-Gang Wang ◽  
Wei Lin ◽  
Qiang Zhu ◽  
Bing Yan ◽  
...  

Aluminum rich nitride coatings are often used to protect cutting tools and prolong their service life. In this work, a preoxidation technique and duplex coating design were combined to further improve the bearing capacity and heat resistance of cutting tools. The Al-Cr-Si-N, Al-Cr-Si-O-N, and Al-Cr-Si-N/Al-Cr-Si-O-N duplex coatings were developed by arc ion plating, respectively. The morphology, phase constituents, mechanical and tribological properties of the coatings were characterized and tested by SEM, XRD, a micro-hardness tester, scratch tester, and tribometer. The results showed the coating became more compact and smoother after oxygen doping. However, the Al-Cr-Si-N coating presented the best mechanical properties and tribological behaviors. Its hardness and critical load showed the highest values, which were about 4000 HV and 81 N, respectively. A friction coefficient of 0.67 and wear rate of 1.4 × 10−3 μm3/N·mm were also the lowest values in the study. The three coatings were deposited on the same solid carbide end mills and performed the cutting tests under same conditions. By comparison, the Al-Cr-Si-N coated tool presented the longest tool life and minimum cutting force when cutting C1045 medium-carbon steel. After 90 min of dry milling, the width of the flank wear band (VB) of the AlCrSiN coated tool reached 135 μm, which was much lower than that of the other two coated tools.


2012 ◽  
Vol 184-185 ◽  
pp. 1167-1170
Author(s):  
Guang Yu Du ◽  
Zhen Tan ◽  
Kun Liu ◽  
Hao Chai ◽  
De Chun Ba

In this paper TiN coating was prepared on stainless steel substrate using arc ion plating technique. The coating samples’ phases, surface morphology, micro-determination chemical composition, loss factor and damping ratio were tested. The phases of TiN coating were determined by X-ray diffraction (XRD) technique. The surface morphology and chemical composition of the TiN coating were analyzed by scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS), respectively. The damping performance of the samples was measured by hammering activation according half power bandwidth method. The loss factor or damping ratio of samples were obtained according frequency response curve. The results showed that damping performance of samples was considerably improved by TiN coatings.


Sign in / Sign up

Export Citation Format

Share Document