Certech strengthens ceramic cores

The ceramic cores, which are used to cast high performance aerospace and industrial turbine blades, can now be manufactured with a tougher coating, enabling customers to improve yields and achieve associated cost savings. MTC Certech manufactures high quality ceramic cores using a proprietary low-pressure injection moulding and firing process. The cores are then coated using a new urea impregnation method, which gives them a tough coating. Traditionally a PVA glue coating is used, but through using this new technique, MTC Certech has increased the strength of its ceramic cores significantly. As a result, they are less susceptible to fracture and failure during the manufacturing process of turbine blades and customers can achieve increased product output with reduced wastage. MTC Certech's cores allow the creation of internal cavities with highly complex geometries during the investment casting process. Thin sections of 0.5 mm and tolerances of up to +/-0.08mm can be achieved.