Research Article
Corundum Molds for Investment Casting from Refractory Alloys and Metals
Table 4
Relationship between ALUMOX-based shell mold mechanical properties and activator amount.
| ASD-4 amount, wt. % | 5 | 7 | 10 | 12 | Liquid : Solid : ASD-4 | 25 : 70 : 5 | 25 : 68 : 7 | 25 : 65 : 10 | 25 : 63 : 12 |
| Amount of layers | 6 layers completely, 7 ones without dusting |
| of dry sample, MPa | 2.2 | 2.4 | 2.7 | 3.0 | of calcined samples at 125C, MPa | 7.0 | 7.4 | 9.4 | 14.1 | of calcined samples at 135C, MPa | 11.8 | 15.5 | 20.5 | 19.2 |
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