Design Guide: Material Properties

Material Properties

Rupture Strength of Injection Molded Ceramics

(Compositions in wt. %)

Material Density % Strength MPa Weibull Modulus Hardness VHN
99% Alumina (Al2O3) 98 300 – 450 9 1200 – 2000
Alumina-Zirconia (Al2O3-20ZrO2) 97 400 – 600 1800
Cemented Carbide (WC-10Co) 100 1500 – 2600 12 1300 – 1700
Cemented Carbide (WC-7Co-1TaC) 100 2100 – 2200 1700
Silicon Nitride (Si3N4-8Y2O3) 98 350 – 800 15 – 35 1600
Zirconia (ZrO2 -3Y2O3) 95 200 – 800 12 1200

For MIM systems the strength measured over repeat samples typically has a standard deviation of less than ±20 MPa (±3 ksi) and the elongation has a standard deviation of approximately ±%. When different operations are compared, most properties are similar, but a few, such as impact toughness, vary considerably.