Sedimentation Process and Phase Transition of Solids Under High Gravity
The recent progress and future prospects for ultra-centrifugal sedimentation in solids are described,mainly involving equipment,miscible systems and compounds.Almost 90%ultracentrifugation experiments were performed on the 1st and 2nd high-temperature ultracentrifuge which is typically operated at temperatures below 500 ℃ under the maximum centrifugal acceleration up to 106 g.The strong gravitational and temperature fields induce atomic-scale graded structure,grain growth and refinement,and voids accumulation caused by the atomic sedimentation in miscible systems.New structures,properties and substances are produced in some compounds.A new cantilever high-temperature ultracentrifuge with a test temperature up to 1200 ℃ is under construction at Zhejiang University,making it possible to simulate the composition,microstructure and property evolution of superalloys in the operating environment of aircraft engines.
high gravitysedimentationdiffusionsuperalloy
王嘉晖、赵新宝、岳全召、尤方杰、夏万顺、谷月峰、张泽
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浙江大学材料科学与工程学院高温合金研究所,浙江杭州 310027
浙江大学工程师学院,浙江杭州 310027
浙江大学材料科学与工程学院硅及先进半导体材料全国重点实验室,浙江杭州 310027
超重力 沉降 扩散 高温合金
National Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities