Plasma spray is a thermal spray coating process that uses a high-temperature plasma jet to melt and propel materials onto a surface. This technique is commonly used to apply coatings for wear resistance, corrosion protection, and thermal insulation. The materials used can include metals, ceramics, and polymers, which are fed into the plasma jet and then deposited onto the target surface. The process begins by creating a plasma arc between two electrodes, which ionizes a gas, typically argon or hydrogen. This ionized gas reaches extremely high temperatures, allowing the feedstock material to melt and be sprayed onto the substrate. The result is a strong, durable coating that enhances the performance and longevity of various components in industries such as aerospace, automotive, and manufacturing.