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Ceramic Alumina Abrasive performance and test method

Different ceramic alumina abrasive from different manufacturer has slightly different performance, mainly focus on below aspect

From: ROY MaterialDate: 2020-06-28 03:27:27Views: 238

Different ceramic alumina abrasive from different manufacturer has slightly different performance, mainly focus on below aspect:

Physical Parameter

Range

Test method/equipment

True densityg/mm3

3.85-3.95

Helium density

Hardness, HV

1600-2200

Micro Viker

Crystalline sizenm

50-500

Scanning Electron Microscope

Ball mill toughness,%

35-85

Ball mill and particle distribution

 

These parameters will directly affect the grinding performance of Ceramic Alumina Abrasive. Please refer to below table:

 

Item

Mechanism

Effect to the grinding process

True density

Low true density means high porosity within abrasive grains.

Less than 3.85g/mm3 for ceramic alumina abrasive means grains are easy to be broken and lower durability due to porosity

Hardness

Means the ability of grains to resist deformation at the force

More than twice as workpiece hardness is enough

Crystalline size

The size of the tiny cell to build abrasive grain

Bigger crystalline size, more strength of grain, more durability and less sharpness. Smaller crystalline size, more sharpness,   less durability and less strength of grain.

Ball mill toughness

Toughness means the ability of grains to resist the impact force

45-70% is a reasonable range, less than this means easy to be fractured. Bigger than this means too strong and less sharpness.

For abrasive grains, 3 key characters are hardness, toughness, and sharpness. Below is a map of different materials.

 

When design a grinding tool, it’s needed to consider the character of different abrasive grains to achieve better performance.

 

From: Roy Material

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