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Tag Archives: Zirconia Ceramic Roller

Alumina is Harder than Zirconia, So It Must be More Wear Resistant?

Although it’s commonly accepted that hardness equates with wear resistance, it’s not always the case. In sliding wear environments, hard counter faces that do not interact with each other are an advantage. The engineering grades of Alumina are typically 25-50% harder than zirconia grade so in sliding wear environments or pure abrasive wear, where third body abrasive wear particles are present, alumina often outperforms Zirconia.

However, in erosive wear environments such as those caused by an abrasive slurry impacting a wear part such as an oilfield valve, Zirconia can be the best performer as it’s high toughness reduces the spread of impact cracks and the micro fracture of the surface which generate erosive wear debris and surface damage.

When running an engineering ceramic against a dissimilar material it’s not always the case that the softer material performs poorly. Y-TZP running against Y-TZP has been shown to be a very poor wear surface combination, whereas, Y-TZP running against cast iron provides a better overall wear performance than the harder, alumina/cast iron combination.

Although its beyond this article to delve too deep into the tribology of ceramic interfaces, in Zirconia on Zirconia contact it’s the low thermal conductivity of the Zirconia that can be a negative factor, as the frictional heat generated in like on like sliding does not dissipate from the surface and the surface hardness decreases with a follow on increase in wear related damage.

Advanced Ceramics Show on The 9th China(Jingdezhen)International Ceramic Fair

The 9th China(Jingdezhen)International Ceramic Fair on 18th-22th Oct,2012,

The principal exhibitions of the Fair include:
1, Daily-use Ceramics
2, Creative Ceramics
3, Overseas Ceramics
4, Advanced Ceramics
5, Ceramic Packaging
6, Tea-sets & Tea-ceremonies
7, Art Ceramics
8, Contemporary International Ceramic Exhibition
9, Exhibition of Finest Ceramics from Ten Famous Kiln Sites

Some interesting products show as below;

Alumina Ceramic Pen

Alumina Ceramic Pen

Alumina Ceramic Bend Tube

Alumina Ceramic Bend Tube

Alumina Ceramic Faucet with applique galze

Alumina Ceramic Faucet with applique glaze

Alumina Ceramic Tube and Ring

Alumina Ceramic Tube and Ring

Other Advanced Ceramic Components

Other Advanced Ceramic Components

Advanced Ceramic Components for daily-used

Advanced Ceramic Components for daily-used

Ultra-thin Transparent Ceramic Lighting

Ultra-thin Transparent Ceramic Lighting

Zirconia Ceramic Components

Zirconia Ceramic Components

Zirconia Ceramic Roller

Zirconia Ceramic Roller