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This section provides an overview for sintering as well as their applications and principles. Also, please take a look at the list of 13 sintering manufacturers and their company rankings. Here are the top-ranked sintering companies as of December, 2024: 1.Eurobalt, 2.ARRK North America, Inc., 3.California Nanotechnologies.
Table of Contents
Sintering is an object that becomes dense when powdered metals are hardened and then joined together atoms at a temperature lower than their melting point.
In the initial stages of sintering, the powder particles form a neck that is bonded to each other. Diffusion of ions, atoms, and molecules on the surface of the neck causes the neck to grow larger and the surface area of the sintering object to decrease. At this point, the diameter of the neck is approximately 30% of the particle diameter.
The pores inside the sintering will change their shape to a tube-like structure and become connected to each other. Pores in this state are called open pores. Finally, the relative density exceeds 95% and the pores are dispersed within the sintered body, resulting in a closed pore state.
Sintering is used to form materials that cannot be processed by plastic deformation, such as rolling and forging. For example, they are used in powder metallurgy and in the manufacture of ceramics. Compared to casting, where defects may or may not occur depending on the conditions of the mold and hot water, sintering offers more flexibility in shape and is therefore used for parts with complex shapes, such as automobile engine parts, drive train parts, small gears, and bearings.
Sintering can be used with almost any metal that can be made into powder. Therefore, sintering is also applied to parts made of tungsten and molybdenum, which have high melting points, and titanium, which easily reacts with other elements at high temperatures.
The main sintering methods are atmospheric pressure sintering and pressure sintering, but research and development of electromagnetic field-assisted sintering as a new method is progressing, and some practical applications have begun.
1. Atmospheric Pressure Sintering
Atmospheric pressure sintering is a sintering method in which the atmosphere is at atmospheric pressure. There are two types of sintering methods: liquid phase sintering, in which a liquid phase is generated at high temperatures using additives to produce densification; and solid phase sintering, in which densification occurs through mass transfer between solid phases without generating a liquid phase.
2. Pressure Sintering
Pressure sintering is a method of densification by applying external pressure and includes hot press sintering and hot isostatic sintering. In hot press sintering, uniaxial pressure is applied to the powder, while in hot isostatic sintering, the powder is encapsulated in glass or metal and pressurized with gas to solidify.
3. Electromagnetic Field Assisted Sintering
Pulsed energized pressure sintering, microwave/millimeter wave sintering, and electric field assisted sintering are available. Pulsed current pressure sintering is a method of sintering by passing a pulse current of several thousand A through a conductive mold while applying pressure. Microwave and millimeter wave sintering are self-heating methods from the inside of the derivative, and heat treatment can be performed in a short time with high thermal efficiency. By raising the ambient temperature while energizing the powder compact directly, sintering can be performed at lower temperatures than with atmospheric pressure sintering.
*Including some distributors, etc.
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California Nanotechnologies, founded in Cerritos, California, in 2005 is a manufacturer of Spark Plasma Sintering (SPS) and Cryogenic Milling. The company's product portfolio includes SPS systems to utilize pulsed direct current to achieve rapid, high-density sintering of advanced materials, such as ceramics, metals, and composites and cryogenic milling machines used for ultra-low temperatures to process and mill a wide range of materials, including polymers and elastomers. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building.
Eurobalt, established in 2015 and based in Tallinn, Estonia, is a manufacturer of hydraulic cylinders, sintered parts, and die-casting products. The company uses technologies such as powder metallurgy, casting, machining, aluminium die casting, and forging to manufacture products including cemented carbides, shock absorber parts, large-size stainless steel casting, and permanent magnets. With production facilities in India and China, the company has been catering all the products to different industries, including automotive, consumer electronics, agricultural machinery, and large industrial facilities. The company performs quality checks according to the PPAP standards.
OHARA INC., established in 1935 and headquartered in Sagamihara-shi, Kanagawa, Japan, is a manufacturer of optical glass products. Its diverse product range encompasses optical glass for polished lenses, Low Tg Optical Glass, and glass ceramics. These materials find application across various industries, particularly in optical and electronic equipment. The company's products are utilized in a wide range of applications, making them an essential component in the manufacturing of quality lenses and optical systems.
MOKO Technology was founded in 2006 and is a PCB and PCBA manufacturer headquartered in Shenzhen, China. The company specializes in PCB design, PCB fabrication, and PCB assembly. It also offers various services for electronic manufacturing, including electronic assembly, rapid prototyping, and lifecycle management. The company operates a PCB assembly facility that offers surface mount, through-hole, and mixed technology assembly, along with component sourcing, testing, and quality control services. It complies with ISO 9001:2015, ISO 14001, RoHS, and UL quality standards and serves various industries, including automotive, medical, consumer electronics, renewable energy, and telecommunications.
Höganäs is a manufacturer of metal powders for powder metallurgy. Founded in 1797 in Höganäs, Sweden, the company supplies various metal powders used in processes like pressing and sintering, surface coating, brazing, and additive manufacturing. Examples of products made using the company's metal powders include bearings, motors, zirconia, saw blades, and metal hydrides. From its global network of 17 production and storage facilities, Höganäs produces and supplies over 3,000 customer-specific products for clients around the world.,
Solar Atmospheres, founded in 1983, is a supplier of vacuum heating and brazing with 24/7 operation and located in Souderton, PA. The company is a manufacturer of aircraft parts, power generation blades, tubes & pipes, braze assemblies, and castings using alloy steels, copper, tungsten, nickel-based alloys, and titanium. It also provides vacuum heating services which include metal stress relieving, hardening & tempering, low-pressure carburizing, age hardening, and sintering services to the forging, additive manufacturing, aerospace, medical, and nuclear markets. The company is certified with ISO 9001:2015 and AS9100D quality standards.
Omnidex, established in 1981 in Guangzhou, China, is a manufacturer and supplier of metal and plastic engineering products made from raw materials such as aluminum, engineered resins, polycarbonate, styrenes, and polypropylene. The company offers casting, fabrication, machining, and molding solutions for companies in the USA, China, Australia, Europe, and the United Kingdom. Besides that, it provides services such as metal and sand castings, CNC sheet fabrication, CNC turbines, and injection molding.
Technology Assessment & Transfer, Inc. (TA&T), incorporated in 1983, is a Maryland, the United States based manufacturing company specializing in advanced materials-oriented technologies for aerospace, defense, biomedical, and industrial applications. The company’s technologies and products include 3D printing of ceramic medical devices and heat exchangers, chemical vapor infiltration and deposition of complex fiber-reinforced ceramic-matrix composites, and hot pressing of transparent armor and other technical ceramics. It has a long track record of successfully winning research contracts from the U.S. government. In 2022, it was acquired by SINTX Technologies, Inc., significantly increasing SINTX’s capabilities in the aerospace, defense, and biomedical markets.
Soluciones Globales y Gestión de Compras S.L., established in 2004 and headquartered in Albacete, Spain, is a supplier of industrial equipment. The company's product portfolio includes die casting, CNC machining, and forged forming machines. It also supplies rubber and metal molding and extrusion equipment, as well as sheet metal fabrication equipment. It serves a wide range of sectors, including automotive and construction industries. The company's services include custom sourcing of machines and equipment and the supply of full logistics with customs and tariff management.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Eurobalt |
17.3%
|
| 2 | ARRK North America, Inc. |
14.8%
|
| 3 | California Nanotechnologies |
13.6%
|
| 4 | MOKO Technology |
12.3%
|
| 5 | Omnidex |
6.2%
|
| 6 | Höganäs |
6.2%
|
| 7 | Solar Atmospheres |
6.2%
|
| 8 | Plexismart S.r.l. |
4.9%
|
| 9 | Xcentric Mold and Engineering, LLC |
4.9%
|
| 10 | Gestión de Compras. Industrial Sourcing |
3.7%
|
Derivation Method
The ranking is calculated based on the click share within the sintering page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
3 | 30.0% |
|
China
|
2 | 20.0% |
| Estonia | 1 | 10.0% |
|
Japan
|
1 | 10.0% |
|
Sweden
|
1 | 10.0% |
Italy
|
1 | 10.0% |
|
Spain
|
1 | 10.0% |
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