| 摘要 |
The invention relates to a method for producing a sacrificial body from an initial mixture which is then used to produce a component consisting of an Al2O3/titanium aluminide composite substance. The invention also relates to an initial mixture and to a sacrificial body. In addition to titanium, preferably in oxide form, carbon and/or its intermediate products, fillers and binders are added to the initial mixture. A shaped body is then pressed from the initial mixture and subjected to heat treatment at a transition temperature in order to obtain a pressure-resistant sacrificial body. The filler and optionally, the binder are thermally removed during this process. The sacrificial body is provided under pressure for subsequent filling with aluminium and/or an aluminium alloy. The filling process takes place at a filling temperature which is higher than the transition temperature. The materials in the filled sacrificial body and the aluminium are reacted in a solids reaction below the filling temperature to form an Al2O3/titanium aluminide composite body. |
