Journal
MATERIALS
Volume 14, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/ma14123248
Keywords
ceramic matrix composite; additive manufacturing; laser technology; wavelength dependent absorption rate; integrating sphere measurement
Categories
Funding
- Bundesministerium fur Bildung und Forschung (BMBF) [03ZZ0222C]
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Ceramic matrix composites (CMCs) are refractory materials increasingly used in various industries. A new additive manufacturing process is being tested to produce CMCs faster and more cost-efficiently, incorporating laser melting technology. The process allows for higher component wall thicknesses and material joints. Validation through integrating sphere measurement and melting tests ensures the effectiveness and feasibility of the process.
Ceramic matrix composites (CMCs) are refractory ceramic materials with damage-tolerant behavior. Coming from the space industry, this class of materials is increasingly being used in other applications, such as automotive construction for high-performance brake discs, furnace technology, heat coatings for pipe systems and landing flaps on reusable rocket sections. In order to produce CMC faster and more cost-efficiently for the increasing demand, a new additive manufacturing process is being tested, which in the future should also be able to realize material joints and higher component wall thicknesses than conventional processes. The main features of the process are as follows. A ceramic fiber bundle is de-sized and infiltrated with ceramic suspension. The bundle infiltrated with matrix material is dried and then applied to a body form. During application, the matrix material is melted by laser radiation without damaging the fiber material. For the initial validation of the material system, samples are pressed and analyzed for their absorption properties using integrating sphere measurement. With the results, a suitable processing laser is selected, and initial melting tests of the matrix system are carried out. After the first validation of the process, a test system is set up, and the first test specimens are produced to determine the material parameters.
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