ما هي الطرق الرئيسية الثلاثة لطلاء PVD؟

طلاء ترسيب البخار الفيزيائي هو تقنية معالجة سطحية متقدمة تستخدم على نطاق واسع في العالم. مبدأ عملها هو استخدام تصريف الغاز لتأين جزئي للغاز أو مادة مبخرة في ظل ظروف فراغ ، وإيداع المادة المبخرة أو مفاعلها على الركيزة أثناء قصف أيونات الغاز أو أيونات المادة المتبخرة. في الوقت الحاضر ، تنقسم تقنية PVD الأكثر استخدامًا في السوق بشكل أساسي إلى ثلاث فئات: رش المغنطرون والطلاء متعدد الأيونات وترسيب البخار.

Magnetron sputtering coating of PVD

Working principle: electrons collide with argon atoms in the process of accelerating to the substrate under the action of electric field, ionizing a large number of argon ions and electrons, and electrons fly to the substrate. Argon ions accelerate the bombardment of the target under the action of the electric field, and a large number of target atoms are splashed out and deposited on the surface of the base layer to form a film layer.

Characteristics of sputter coating

(1) small particles

Sputter coating can make the film particles fine, which is suitable for optical grade coating

(2) low deposition rate

Sputtering coating is not suitable for industrial coating because of its low deposition rate and low efficiency

(3) uniform coating

The sputter coating has the characteristics of small particles and slow deposition, and the high-precision coating can be achieved with appropriate loading mode

(4) high binding force

Compared with traditional coating, sputter coating has higher adhesion to substrate

(5)complicated process

Sputtering coating requires higher configuration

Multi arc ion coating

Working principle: the method of arc discharge is adopted to directly evaporate metal on the solid cathode target. The evaporated material is the ions of the cathode material emitted from the bright point of the cathode arc, and then deposited on the surface of the substrate as a thin film.

By combining glow discharge, plasma technology and vacuum evaporation, ion plating can not only improve the film quality, but also expand the application range of the film.

Characteristics of arc coating

(1) higher production efficiency

(2) the single ion energy of arc coating can make the coating firmly deposited on the substrate surface

(3) stable process, more accurate control can be achieved on the composite coating

Vapor deposition coating

Working principle: under the vacuum condition, the coating material (or film material) is evaporated and gasified by certain heating and evaporation method, and the particles fly to the surface of the substrate to form a film.

vapor deposition coating’s characteristics

(1) simple process, mature technology and wide application

(2) it is not suitable for high melting point materials and low hardness materials, and it is not suitable for large-scale production because of the slow coating time

Performance of PVD coating

Compared with traditional surface strengthening technologies, such as electroplating, electroless plating and chemical heat treatment, PVD coating has good adhesion performance, good coating quality, wide range of plating materials, and the thickness of the film is micron. Therefore, various physical and chemical properties of the workpiece surface can be improved without affecting the original size of the workpiece. In addition to plating non-metal or metal on metal workpieces, PVD can also be plated with metal or non-metal on non-metal, or even plastic, rubber, quartz, ceramic, etc., to achieve the functions of wear resistance, friction reduction, corrosion prevention, rust prevention, heat resistance and oxidation resistance.

According to many statistics, the use of PVD coated inserts not only reduces the use of release agent, labor cost and mold change time, but also greatly improves the output and yield, providing an effective solution for enterprises to increase efficiency and reduce costs, save energy and reduce pollution.