High-entropy alloys are complex composition alloys consisting of five or more elements in equiatomic or near-equimolar ratios. They were initially defined with atomic percentages ranging from 5% to 35%, but ternary and quaternary alloys with near-equimolar ratios are also considered high-entropy alloys.
High-entropy alloys have unique features and advantages. They promote the formation of high-entropy solid solutions, have lower diffusion coefficients, induce solid solution strengthening, and optimize various alloy properties.
Among numerous high-entropy alloy materials, high-entropy alloy targets are particularly significant, known for their stability and thermodynamic properties, and are widely used in thin film deposition and coating. These targets enable the production of superior thin films with excellent hardness, corrosion resistance, and thermal stability.
Here is a comparison between high-entropy alloy targets and traditional targets, using two common traditional targets: copper and gold
Item | Mechanical Properties | Corrosion Resistance | Thermal Stability | Customizability |
High-entropy Alloy targets | a rich composition and uniform mixing, resulting in higher hardness and fatigue resistance | excellent corrosion resistance due to their uniform element distribution and remain stable in strong oxidizing or acidic environments. | good stability at extremely high temperatures due to atomic-level mixing and stable crystal lattice structures. | extensive customization options by varying the elements and their ratios, making them highly versatile. |
Copper Targets | lower strength and hardness but are preferred for high thermal conductivity. | prone to oxidation and have lower corrosion resistance. | poor thermal stability and tend to perform poorly or undergo transformations in high-temperature environments.
| fixed properties and limited customization capabilities.
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soft but preferred for excellent reflectivity and conductivity. | extreme corrosion resistance. | With poor thermal stability and at high temperatures, they will generally melt or undergo other forms of transformation. | fixed properties and limited customization capabilities. |
High-entropy alloy targets exhibit significant advantages in terms of resistance to mechanical stress, corrosion, thermal stability, and customizability. However, traditional targets have their unique advantages in specific requirements. Therefore, when choosing the appropriate target, it is necessary to consider the performance requirements, actual application environment, cost-effectiveness, and other factors comprehensively.
Heeger Materials is a reputable supplier offering top-notch High-entropy Alloy and Sputtering Target products at competitive prices, which are widely used in research and science fields. If you're interested, feel free to contact us at [email protected] for a quote, and we guarantee a response within 24 hours.