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2022-10
The principle of a vacuum bidirectional pressurized sintering furnace
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【Summary Description】A vacuum double-action pressurized sintering furnace is a type of furnace used to sinter heated materials under vacuum conditions for protection. Heating methods include resistance heating, induction heating, microwave heating, and more. Among these, the vacuum double-action pressurized sintering furnace specifically employs induction heating to sinter materials in a controlled, protective environment. These furnaces are categorized into types such as power frequency, medium frequency, and high frequency, making them a subcategory of vacuum sintering furnaces. Now, let’s explore the principles behind the vacuum double-action pressurized sintering furnace!
A vacuum bidirectional pressure sintering furnace is a furnace that sinters heated materials under vacuum conditions for protection. Heating methods include resistance heating, induction heating, microwave heating, and more. Vacuum Dual-Direction Pressurized Sintering Furnace It's a furnace that uses induction heating to protectively sinter the material being heated, available in types such as power frequency, medium frequency, and high frequency. It also falls under the subcategory of vacuum sintering furnaces. Now, let’s explore the principle behind the vacuum bidirectional pressure sintering furnace!
Basic principle:
A method of sintering objects in a furnace using a specific amount of gas. Selecting the appropriate atmosphere for different materials can optimize the sintering process, enhance the densification of the product, and ultimately lead to materials with superior performance. Vacuum Dual-Direction Pressurized Sintering Furnace Typically, various atmospheres are used, including inert gases such as vacuum, hydrogen, oxygen, nitrogen, and argon. For instance, transparent alumina ceramics can be sintered in a hydrogen atmosphere, while transparent ferroelectric ceramics are sintered in an oxygen environment. Nitride ceramics like aluminum nitride, on the other hand, are sintered in a nitrogen atmosphere. Occasionally, to protect the sintering compacts during the process, operations must be conducted under controlled environmental conditions. For example, molybdenum furnaces are connected to hydrogen gas, whereas tungsten furnaces operate under vacuum.
Key advantages:
1) Vacuum helps remove adsorbed gases, significantly enhancing the shrinkage effect during the later stages of sintering.
2) Vacuum helps remove impurities such as silicon, aluminum, magnesium, calcium, and their oxides, thereby purifying the material.
3) Vacuum enhances the wettability during liquid-phase sintering, promoting shrinkage and improving the microstructure of the alloy during the sintering process.
4) Vacuum provides an ideal inert atmosphere; other reducing or inert gases should not be used. Materials prone to decarburization or carburization can instead be sintered in a vacuum furnace.
5) Reduce contamination of the product by harmful components in the environmental medium (such as water, oxygen, and nitrogen).
What are the main functions and uses?
The vacuum bidirectional pressurized sintering furnace is commonly used in various research projects and is also employed by certain military industrial units. During operation, hydrogen gas can be introduced under vacuum conditions, leveraging chemical principles to generate high temperatures for efficient heat transfer. Most refractory metal materials are processed using this advanced technology. Vacuum Dual-Direction Pressurized Sintering Furnace 。
The vacuum bidirectional pressurized sintering furnace, after evacuating the chamber and under hydrogen protection, utilizes a medium-frequency induction heating principle to heat the tungsten crucible housed within the coil to extremely high temperatures. Heat is then transferred via thermal radiation to the materials being processed, making it ideal for research institutions and defense-related sectors that require shaping and sintering tungsten, molybdenum, and their alloy powders. When installing the furnace, ensure the site meets vacuum hygiene standards, with clean, dry ambient air and excellent ventilation. Additionally, the workspace should be free from dust or other airborne particles that could interfere with operations.
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