AlTiN Coating by Cathode-Integrated HiPiMS for High-Rate Clean Deposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional PVD technologies face issues with large particle pollution leading to increased roughness and reduced adhesion in coatings, while HiPiMS technologies struggle with low ionization and deposition rates due to non-continuous discharge.
Innovation Solution
A cathode integrated HiPiMS method with high-current and high-voltage square discharge waveform, allowing for continuous discharge at a peak current level, achieving high ionization and deposition rates, and adjusting grain size and phase structure for improved coating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If arc ion plating (AIP) technology is used, then deposition rate and ionization rate are improved, but large particle pollution increases causing rougher surface and reduced adhesion
Solution Approach 1:
The patent segments the discharge process into distinct phases: a high-current arc phase for rapid deposition followed by a low-current magnetron sputtering phase for surface cleaning and particle removal. This temporal segmentation allows the system to achieve high deposition rates while periodically eliminating large particles that would otherwise pollute the coating
Solution Approach 2:
The patent implements periodic action through pulsed power delivery with alternating high-current and low-current phases. The high-current phase deposits material rapidly, while the subsequent low-current phase cleans the surface and removes particles. This periodic cycling continues throughout the coating process, maintaining both high productivity and coating quality
2Object-affected harmful factors
If conventional HiPiMS is used, then large particle pollution is avoided, but ionization rate and deposition rate remain low due to non-continuous discharge
Solution Approach 1:
The patent achieves continuous useful action by maintaining a continuous discharge process with alternating high and low current phases. Unlike conventional HiPiMS with intermittent discharge, this continuous pulsed operation ensures that material deposition and surface cleaning occur without interruption, maximizing both ionization rate and deposition rate while avoiding particle pollution
Solution Approach 2:
The patent applies dynamics by continuously varying the current and power levels during the discharge process. The system dynamically transitions between high-current arc mode for rapid deposition and low-current magnetron mode for cleaning, with real-time adjustment of power supply parameters to optimize both deposition rate and coating quality throughout the process
3Productivity
If high current is applied to increase deposition rate, then productivity improves, but particle generation increases causing coating defects
Solution Approach 1:
The patent uses periodic action with alternating high-current and low-current phases. During the high-current phase, material is deposited rapidly at high rates. During the subsequent low-current phase, the reduced power level allows for surface cleaning and particle removal without significant deposition, effectively eliminating the harmful particles generated during the high-current phase
Solution Approach 2:
The patent converts the harmful effect of high-current particle generation into a beneficial process by immediately following with a low-current cleaning phase. The particles generated during rapid deposition are subsequently removed during the low-power phase, transforming what would be a defect into an opportunity for surface rejuvenation and improved coating quality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves a smooth, droplet-free coating with high binding force, rapid deposition rate, and adjustable hardness and toughness, combining the benefits of AIP and MS coatings.
Implementation Method 1
continuous discharge at a peak current could reach a millisecond (ms) level, resulting in high ionization rate
Implementation Method 2
Physical vapor deposition (PVD) cutting-tool coating is prepared by applying a material onto a surface of a cutting-tool with a PVD method
Implementation Method 3
magnetron sputtering (MS) and arc ion plating (AIP)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a method for preparing a coating by cathode integrated HiPiMS, a device, and an aluminum titanium nitride (AlTiN) coating. The method includes: subjecting a substrate to the HiPiMS to obtain the coating, where cathode discharge in the cathode integrated HiPiMS is high-current and high-voltage discharge; and in the high-current and high-voltage discharge, a peak current is in a range of 200 A to 2,000 A, a peak voltage is in a range of 200 V to 2,000 V, and a discharge waveform is square.