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虫号: 8876150
注册: 2018-05-26
专业: 金属结构材料

[交流] 德国波鸿大学全职博士位置、高熵合金方向（税后2200欧/月，另包保险以及养老金）

BCC高熵合金方向，会使用三维原子探针和透射电镜研究析出相和相变等。这个项目是德国高熵合金重点项目其中子项目，学生会经常和德国境内高熵合金组学生和老师学术交流。100%德国工作合同项目（德国博士项目很少给100%工作合同，税后大概2200欧元，另外还有免费德国医疗保险和养老金）。欢迎有很强高熵合金/bcc钛合金相变/透射电镜背景同学申请！

Refractory high-entropy alloys (RHEAs), consisting of elements with high melting points, are promising candidates for high-temperature applications beyond Ni-based superalloys and other conventional refractory alloys. Among RHEAs, the equiatomic body-centered cubic (BCC) TiZrNbHfTa alloy exhibits an excellent combination of ductility and strength at room temperature. This alloy was initially thought to be stable since its high mixing entropy should inhibit the formation of secondary phases. However, upon aging below 900 °C, a hexagonal close-packed (HCP) phase precipitates, leading to a severe deterioration in ductility. To improve the mechanical performance of BCC RHEAs, one must know how to control the formation of microstructural features and understand their roles in deformation behaviors. In this project, the successful PhD candidate will use atom probe tomography and transmission electron microscopy (TEM) to investigate early-stage HCP precipitation and formation of nanoprecipitates (https://www.ruhr-uni-bochum.de/atomic-characterisation). The successful PhD candidate will work with another PhD student under the supervision of Prof. Guillaume Laplanche to establish the structure-property relationships of TiZrNbHfTa RHEAs. This PhD position is a part of priority programme ‘compositionally complex alloys-high entropy alloys (CCA-HEA, SPP 2006).

The Ruhr-Universität Bochum is one of the leading research universities. The university draws its strengths from both the diversity and the proximity of scientific and engineering disciplines on a single, coherent campus. This highly dynamic setting enables students and researchers to work across traditional boundaries of academic subjects and faculties.

The successful candidate will be working in the new research center for interface-dominated high-performance materials (ZGH) at Ruhr University Bochum, which houses a large and comprehensive suite of equipment dedicated to nanostructure analysis; the center is among the best facilities of its kind in the world. She or he will have access to world-class set of laboratories and more than 10 major microscopy platforms, including the state-of-the-art atom probe, aberration-corrected TEM and focused ion beam etc.

The candidate must have:
• an excellent master’s degree in materials science
• solid knowledge of physical metallurgy, familiar with phase transformation in BCC high entropy alloys or titanium alloys, or deformation in BCC titanium alloys
• experience with TEM, or high-resolution TEM, or scanning TEM (STEM), or interpretation of electron diffraction
• a high level of spoken and written English
• can work both independently and as part of an interdisciplinary team
• ability to plan and organize the PhD project effectively
• can work in multicultural environment
• self-motivated and eager to learn

Please send your complete and informative application documents (informative cover letter, CV with certificates) as one pdf document by e-mail to: Prof. Dr. Tong Li, email: atomicjobs-mb@rub.de

Application deadline: 13 December 2020 23:59 pm

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