If you are looking for a Aluminum Nitride, , & Silicon Nitride & Machinable Ceramics product customized and mold making services in China, please feel free to contact Pintejin ceramic machining Team.Get Instant Quote:[email protected] .

Zirconia Reaction Sintering Mode

Zirconia Reaction Sintering Mode

Zirconia Reaction Sintering Mode

Zirconia ceramics can be used in various fields due to their unique properties, but there are problems such as high preparation cost and difficulty in preparing large-sized special-shaped components. Drawing on the experience of preparing reactive sintered alumina ceramics, the Al and AIN powders were fully mixed, then formed by cold isostatic pressing and reacted in a zirconium gas atmosphere.

The newly generated Al particles after zirconization of the Al powder are nanoparticles, and the “old” Al particles are combined during the sintering process to obtain reaction-bonded aluminum anchor (RBA) ceramics.

Zirconia Reaction Sintering Mode

Since Al zirconium is accompanied by a quantitative volume expansion, it can partially offset the shrinkage during sintering. The systematic study of Al/AIN system shows that Al powder content, Al powder particle size and china density are important process parameters for RBA. The volume fraction of Al should not be too high, and the particle size of Al directly affects the zirconization behavior and sintering process of the green body. The zirconium reaction rate of RBAN is controlled by nitrogen diffusion, which conforms to the parabolic law.

The zirconization mechanism of RBAN is controlled by different processes in different temperature ranges: at lower temperatures, the zirconization process is dominated by the zirconization of small Al particles, which is controlled by the diffusion of nitrogen through the broken zirconium film; At higher temperature, the zirconization in the early stage is controlled by the diffusion of Nz along the zirconium film of the large Al particles, and the film layer of the large Al particles is ruptured in the later stage, and the zirconization reaction is accelerated.

 

 



Pintejin machining ceramic service include : Alumina Ceramic PartsZirconia CeramicSilicon Carbide CeramicCNC Machined Aluminum Nitride CeramicMachinable Ceramic PartsGlass Ceramic,Macor Ceramic,Powder Metallurgy Dies,Ceramic Injection Molding,Ceramic Dry Pressing,Ceramic Extrusion Dies


What are the advantages of alumina ceramic structural parts?

Alumina ceramics is a kind of ceramics with a wide range of uses. Because of Read more

What are the uses of zirconia ceramic materials?

Zirconia ceramic materials have many advantages and characteristics, so all kinds of products made of Read more

Why do zirconia ceramics have dimensional tolerances after finishing?

Zirconia ceramic products have precision errors or tolerance ranges after ceramic machining, so what is Read more

Detailed process of zirconia ceramic machining

The zirconia ceramic products we know have very good toughness. They fall intact from a Read more

Introduction to the properties and characteristics of alumina ceramics

Alumina ceramic is an industrial ceramic with high hardness that can only be processed by Read more

Alumina Ceramic Properties and Influencing Factors of Wear Amount

With the continuous development and progress of science and technology, alumina ceramics with superior performance Read more

The principle and characteristics of extrusion molding process

The principle of extrusion molding: the metal powder can be extruded at a certain temperature Read more

Temperature Control During Sintering of Alumina Ceramics

The temperature difference and time of the high-temperature firing treatment after the alumina ceramic blank Read more