Wear Selection Criteria

Wear Resistant Solutions

CerCo -- Wear-Resistant Ceramic Formulation Selection Criteria
   

Aluminum Oxide

Material Designation  

P87

 

P90

 

Endura

Material Properties      

FINE GRAINED

 

PROPERTIES

 

TEST METHOD

 

UNITS

     
Bulk Density  

ASTM-C20-87

 

Kg/M3

 

3500

 

3600

 

3600

 

lbs./ft.3

 

218.3

 

224.5

 

224.5

 

g/cc

 

3.50

 

3.60

 

3.60

Apparent Porosity  

ASTM-C20-87

 

%

 

0

 

0

 

0

Flexural Strength  

ASTM-C674-88

 

MPa

 

275.8

 

334.4

 

334.4

 

Kpsi

 

40

 

48.5

 

48.5

Elastic Modulus  

ASTM-C674-88

 

GPa

 

174.6

 

190.0

 

190.0

 

Mpsi

 

25

 

27.2

 

27.2

Compressive Strength  

ASTM-C773-88

 

MPa

 

1723.8

 

1461.7

 

1751.3

 

Kpsi

 

250

 

212

 

254

Tensile Strength  

ACMA#4

 

Kpsi

 

18

 

18.5

 

18.5

 

MPa

 

125.73

 

129.223

 

129.2

Vicker's Hardness  

ASTM-E384-89

 

VHN

 

1190

 

1136

 

1190

Knoop Hardness  

ASTM-E384-89

 

KHN

 

1063

 

1014

 

1063

Rockwell C Scale  

 

Rc

 

71

 

71

 

71

MOH  

Scale

 

 

8.0-9.0

 

8.0-9.0

 

8.0-9.0

Fracture Toughness  

Vicker's Indentation

 

MPa/M2

 

3.9

 

3.9

 

4.2

Crystal Size  

 

MICRON

 

3.0-5.0

 

3.0-5.0

 

2.5-3.5

Linear C.T.E.  

 

PPM/C

     
     

rt-200

 

5.04

 

5.65

 

5

     

rt400

 

5.87

 

6.2

 

6.42

     

rt-600

 

7.08

 

6.57

 

7.06

     

rt-800

 

7.64

 

7.46

 

7.57

     

rt-1000

 

8.6

 

7.7

 

8.7

 

   

Zirmonite 200

 

Zirconium Oxide

 

Silicon Carbide

Material Designation  

Zirconia toughened

 

Zirmonite 1000

 

Si3N4-SiC

Material Properties    

Tetragonal Zirconia

 

Nitride bonded

 

PROPERTIES

 

TEST METHOD

 

UNITS

     
Bulk Density  

ASTM-C20-87

 

Kg/M3

 

4480

 

6000

 

2925

 

lbs./ft.3

 

279.4

 

374.2

 

182.4

 

g/cc

 

4.48

 

6.00

 

2.93

Apparent Porosity  

ASTM-C20-87

 

%

 

0

 

0

 

0

Flexural Strength  

ASTM-C674-88

 

MPa

 

758.5

 

806.7

 

93.1

 

Kpsi

 

110

 

117

 

13.5

Elastic Modulus  

ASTM-C674-88

 

GPa

 

281.5

 

174.6

 

33.2

 

Mpsi

 

40.3

 

25

 

4.8

Compressive Strength  

ASTM-C773-88

 

MPa

 

2930.4

 

2440.8

 

558.5

 

Kpsi

 

425

 

354

 

81

Tensile Strength  

ACMA#4

 

Kpsi

 

70

 

85

 

23.8

 

MPa

 

489.0

 

593.7

 

166.2

Vicker's Hardness  

ASTM-E384-89

 

VHN

 

1650

 

1150

 

773

Knoop Hardness  

ASTM-E384-89

 

KHN

 

1473

 

1027

 

799

Rockwell C Scale  

 

Rc

 

75

 

69

 

63

MOH  

Scale

 

 

9.0

 

7.0-8.0

 

6.5-7.5

Fracture Toughness  

Vicker's Indentation

 

MPa/M2

 

6.5

 

8.6

 

N/A

Crystal Size  

 

MICRON

 

2.0-4.0

 

1.0-2.0

 

bimodal 500 and 20

Linear C.T.E.  

 

PPM/C

     
     

rt-200

 

7.80

 

10.26

 

2.42

     

rt400

 

8.3

 

10.72

 

2.97

     

rt-600

 

8.60

 

11.04

 

3.41

     

rt-800

 

9.10

 

11.11

 

3.75

     

rt-1000

 

9.10

 

11.1

 

4.09

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