http://hdl.handle.net/10379/6198 2017-10-29T22:05:20Z http://hdl.handle.net/10379/6932 Oxidation behaviour of particle reinforced MoSi2 composites at temperatures up to 1700°C. Part II: Initial screening of the oxidation behaviour of MoSi2 composites Lohfeld, Stefan; Schütze, M.; Böhm, A.; Güther, V.; Rix, R.; Scholl, R. In the first part of this paper a literature survey on the oxidation behaviour of MoSi2 and MoSi2 composites has been given. The present second part reports about the experimental results from oxidation tests with several MoSi2 composites containing 15 vol.-% Al2O3, Y2O3, ZrO2, HfO2, SiC, TiB2, ZrB2, or HfB2, respectively, from different development stages. The tests were conducted at 1600°C in air for 100 hours. It was shown that the production route of the powders has a significant influence on the performance of the materials at high temperatures. This was attributed to contaminations. Additionally, the results indicated that only the composites with SiC, ZrO2 or HfO2, respectively, are suitable for application above 1500°C. A more detailed report about the optimised material will follow in the third part of this paper. 2005-03-01T00:00:00Z http://hdl.handle.net/10379/6843 Oxidation behaviour of particle reinforced MoSi2 composites at temperatures up to 1700°C Lohfeld, Stefan; Schütze, M.; Böhm, A.; Güther, V.; Rix, R.; Scholl, R. The topic Oxidation behaviour of particle reinforced MoSi2 composites at temperatures up to 1700°C is discussed in a three part publication. In the first part of this paper a literature survey on the oxidation behaviour of MoSi2 and MoSi2 composites has been given. In the second part an initial screening at 1600°C revealed those composites which may be suitable for high temperature applications. The low temperature oxidation behaviour of selected composites in the pest region was examined as well. Additionally, the effect of iron impurities on the high temperature behaviour of the composites was explained. The present part deals with a detailed investigation of an optimised MoSi2/HfO2 composite. These investigations include high temperature oxidation at 1500 to 1700°C and low temperature oxidation at 400 and 500°C. 2005-04-04T00:00:00Z http://hdl.handle.net/10379/6786 Design and manufacturing of customised maxillofacial prostheses. Serban, D.; Boyle, D.; Lohfeld, Stefan; McHugh, Peter E.; Peckitt, N. Customised implants created by Computer-Assisted Surgery (CAS) techniques and used in maxillofacial reconstruction indicate improved outcomes over conventional techniques. ‘‘Non-functional’’ multistaged procedures are commonly carried out in the treatment of malignancy, often involving the harvesting of hard and soft tissue from a second surgical site. External approaches are associated with an increase in surgical trauma. 2003-04-28T00:00:00Z http://hdl.handle.net/10379/6785 Oxidation behaviour of particle reinforced MoSi2 composites at temperatures up to 1700 °C, Part I: Literature Review Lohfeld, Stefan; Schütze, M. In the first part of this paper the results of a literature review are presented. An overview of the oxidation behaviour in air and in combustion environments of both pure MoSi2 and MoSi2 composites in the temperature range from 400 to 1650 °C is given. The second part of this paper reports about our results from oxidation tests with selected MoSi2 composites (containing 15 vol.-% Al2O3, Y2O3, ZrO2, HfO2, SiC, TiB2, ZrB2, or HfB2, respectively) from different development stages at temperatures in the pest region as well as up to 1700 °C. The third part describes the oxidation behaviour of the optimised MoSi2 composites developed on the basis of the results from part II. 2005-02-04T00:00:00Z