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Application and Challenges of DLC Coatings in Medical Devices
In the healthcare sector, material properties of medical devices play a critical role in treatment efficacy, with surface engineering being pivotal to device performance. Conventional metal devices (e.g., vascular stents, orthopedic implants, surgical instruments) face three major clinical challenges:
Application of DLC Coatings in Internal Combustion Engine Components
Wear in internal combustion engines is an inevitable phenomenon during operation, serving as a critical factor affecting engine lifespan, performance, and reliability. Fundamentally, wear involves the gradual loss of surface materials on friction pairs through oxidation and corrosion. Coatings play an extensive and vital role in engine components.
Preparing high performance TiCN coatings by HIPIMS
TiCN coatings, combining amorphous carbon and nanocrystalline structures, exhibit superior hardness, enhanced toughness, and lower friction coefficients compared to TiC and TiN1. These properties make them widely used in tapping and drilling, particularly suitable for processing non-ferrous metals and alloys2. HiPIMS primarily employs pulsed DC discharge mode. During discharge, high trigger voltage induces peak power density and current density, causing a sharp increase in plasma electron density. The enhanced electron density increases the probability of sputtered atoms colliding with electrons, achieving high ionization rates (20%-100%)³. The high plasma density relies on peak power density and low duty cycle. During pulse switching, plasma particles collide and exchange charges without sputtering the target material, reducing thermal accumulation and preventing ceramic targets from cracking due to overheating4. To some extent, HiPIMS technology integrates the advantages of DC magnetron and cathode arc methods, achieving high ionization rates while avoiding metal particle generation. High ionization rates and current density effectively improve coating deposition quality, reduce surface roughness, and enhance film adhesion and density5. Additionally, high ionization rates enhance particle diffraction properties, effectively addressing thickness non-uniformity issues on complex workpiece surfaces. In this paper, a series of TiCN coatings were prepared on the surface of hard alloy by HiPIMS technology to investigate the influence of power variation on the content of C, microstructure and mechanical properties of the coating, and thread cutting tests were carried out to investigate the actual cutting performance of TiCN coating.
The application of coatings in the semiconductor industry
With the continuous advancement of the semiconductor manufacturing industry, where process technologies have progressed to 3nm and below, the requirements for semiconductor components have become increasingly stringent.
Effect of Bias Voltage on Microstructure and Mechanical Properties of Nanocomposite AlCrN / TiSiN Coatings
Abstract: Multi-layer AlCrN / TiSiN composite coating film with functional layer biases of 40V,80V,120V and 150V are prepared by AIP+HiPiMS technology.Surface droplets are observed by SEM,coating hardness,coating adhesion and stress are measured,and cutting tests are conducted to explore the impact of functional layer bias changes on coating performance.It is found that as the bias voltage of the functional layer increases,the number of droplets decrease first and then increase,with the hardness and adhesion increase and then decrease.The hardness and adhesion reach their maximum at 120V,reaching 34.6GPa and 117.5N respectively.The internal stress increases with the increase of substrate bias of the functional layer.The cutting test results show that the longest service life is 8 hours with the 120V functional layer bias．
The Effect of TiSi Target Magnetic Field Intensity on the Residual Stress of TiAlSiN Hard Coating Deposited by Arc Ion Plating
Reference: CHEN Y F, GUO Z M, HUI Y, et al. The effect of TiSi target magnetic field intensity on the residual stress of TiAlSiN hard coating deposited by arc ion plating[J]. Vacuum and Cryogenics, 2024, 30 (1): 57−63.
Highlights Review | Huasheng CCMT Exhibition and New Product Release Conference was a Complete Success
From April 8th to 12th, 2024, the 13th China International Machine Tool Exhibition (CCMT2024) grandly opened at the Shanghai New International Expo Center in Pudong! This year's exhibition, with the theme of "Focus - Digital • Connected • Intelligent Manufacturing", opened 17 exhibition halls and attracted nearly 2,000 global machine tool and tool exhibitors.
High-Efficiency and Wear-Resistant HFR410 Coating: an Innovative Solution to PCB Processing Challenges
Diamond is renowned for its high hardness and outstanding wear resistance. However, when ordinary cemented carbide tools are applied in the processing of graphite materials, dental dentures, high-speed processing of printed circuit boards (PCBS), new aluminum materials for automotive or aerospace parts, and composite materials, they often encounter problems such as easy wear, easy breakage, easy adhesion to the workpiece material, low efficiency and high consumption. HFR410 coating is an efficient solution for the above application fields. It is not only applied in a wide range of different working conditions and high-tech materials, but also provides personalized solutions for different applications, enhancing the application experience of customers.
Breakthroughs in the Processing Difficulties of Titanium Alloys
With the advancement of titanium extraction technology, the output of titanium has been continuously increasing [4], and the price has been continuously decreasing. However, titanium alloys are still rarely seen in People's Daily lives and are synonymous with luxury and enjoyment. This is because the excellent properties of titanium alloys also pose numerous difficulties in their processing and manufacturing.