Mavad Pajouhan Pouya
About
Mavad Pajouhan Pouya
Lojin Engineering Group
Mavad Pajouhan Pouya Company is a knowledge-based enterprise that, in collaboration with academic and industrial groups, undertakes technology-driven projects in the fields of materials engineering, metallurgy, and surface engineering. The company specializes in the production of vacuum system components (such as ceramic feedthroughs and bimetallic joints) using advanced materials, including superalloys and high-purity alumina ceramics. It employs innovative techniques such as laser welding and brazing to achieve seamless hermetic seals. The company’s products are utilized in strategic industries such as aerospace, electronics, and medical sectors. High-quality raw materials are sourced from abroad, while a portion is produced domestically. The primary objective of the company is to localize complex equipment, such as capacitive pressure sensors, and reduce reliance on imports.
Hermetic seals are used for complete sealing in industries such as aerospace, medical, military, and electronics. These seals, created through laser welding and brazing, are resistant to the penetration of gases and liquids. At Mavad Pajouhan Pouya, Nd/YAG lasers are used for the precise joining of alloys such as Inconel, stainless steel, aluminum, and copper. The active brazing method also allows for direct ceramic-to-metal bonding without the need for metallization. These seals are employed in vacuum equipment and successfully pass helium leak testing. With high precision and exceptional resistance, this technology has become an ideal choice for advanced industries.
Laser welding is a modern and precise method for joining components in precision instruments, medical, and military applications. This technique increases the material's temperature locally by focusing a laser beam, creating a high-strength connection. The use of pulsed Nd-YAG and fiber lasers in this process allows for precise control of the input heat. Adjusting pulse frequency, speed, and beam angle significantly affects the weld quality. At Mavad Pajouhan Pouya, this expertise has been developed for hermetic seal connections and vacuum equipment. Additionally, CNC laser machines enable high-quality welding and repair of complex and power plant components.
Active Brazing (AMB) is a joining technique that allows for the bonding of dissimilar materials, such as ceramic to metal, without the need for metallization. This process involves the use of an active filler material that enhances wetting properties and ensures strong, reliable joints. AMB is particularly useful in applications requiring high-performance, high-temperature, and vacuum systems. The technique is widely applied in industries like aerospace, electronics, and medical devices, providing excellent thermal conductivity and mechanical strength.
Mavad Pajouhan Pouya is actively involved in the production and development of specialized coatings, such as superhydrophobic, high-temperature resistant, corrosion-resistant, and wear-resistant coatings. Techniques such as electroplating, thermal spraying, vapor phase deposition, and sputtering are employed to create these coatings. The company utilizes advanced equipment, including sputtering, plasma spraying, HVOF, and laser technology, to produce high-quality coatings. Additionally, in collaboration with academic research teams, specialized tests such as corrosion testing, wear testing, and surface morphology analysis are conducted. Some key projects include hydrophobic coatings, cold blackening, corrosion and oxidation-resistant coatings, which are offered for various industries.
Moving pump components, such as impellers, are exposed to corrosion, wear, deposition, and cavitation. To prevent degradation, periodic inspection and maintenance are essential. Welding methods are used to repair damages, while composite coatings based on epoxy and ceramics are applied to enhance resistance. These coatings can reach up to 1000 microns in thickness and provide high adhesion, corrosion resistance, and wear protection. Polymer coatings, such as epoxy and polyurethane, offer lower costs, reduced thermal stress, and better control over the components compared to welding coatings. These methods extend equipment lifespan and reduce repair costs.
Mavad Pajouhan Pouya is a knowledge-based company that operates in the fields of materials engineering, metallurgy, and surface engineering. The company specializes in the design and production of precision components and vacuum system equipment for industries such as aerospace, electronics, nuclear, and medical.
The company specializes in manufacturing vacuum system components, including ceramic feedthroughs, bimetallic joints, couplings, capacitive pressure sensors, Pirani gauges, and Penning gauges. Additionally, it offers specialized services in hermetic seals and seamless connections.
Vacuum systems are used in industries such as aerospace, medical equipment, nuclear industries, particle accelerators, and electronics for carrying out sensitive processes in controlled environments.
A hermetic seal is a leak-proof sealing technology used in vacuum systems, electronic components, and industrial equipment. This technology prevents the ingress or egress of gases and liquids, ensuring the proper functioning of devices in vacuum conditions.
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