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3 results on '"Lu- Yao Pan"'

1. The Structural Evolution of Al-6Y-2P Master Alloy and its Influence on the Refinement of Mg2Si Phase in Mg2Si/Al Composites

Author

Hua Qian Yu, Shan Jiang, Lu Yao Wang, Min Zuo, and Lu Yao Pan

Subjects
Materials science, 020502 materials, Mechanical Engineering, Phosphorus, Alloy, chemistry.chemical_element, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, Structural evolution, 0205 materials engineering, chemistry, Mechanics of Materials, Phase (matter), engineering, General Materials Science, Composite material, 0210 nano-technology
Abstract

In this article, a novel Al–6Y–2P master alloy with YP particles was successfully synthesized. By means of the fracture surface observation, it was found that YP particles with an average size of 21.5 μm exhibit the cubic morphologies. With the addition of Al–6Y–2P master alloy, primary Mg2Si particles in Al–Mg2Si composites can be significantly refined to 21.2 μm and 20.3 μm after holding for 30 min and 120 min respectively. Meanwhile, the morphologies of eutectic Mg2Si alter from a flake-like to fine fibrous shape. The reason for the excellent refining performance of this master alloy was discussed based on the chemical kinetics theory. During the solidification process, P atoms distribute homogeneously in the Al melt and precipitate in the form of AlP, providing heterogeneous nucleation sites for primary Mg2Si.

Published
2018

2. TiN-Al Composite Coatings on A356 Alloy by Mechanical Alloying

Author

Lu Yao Pan, Min Zuo, Shan Jiang, Degang Zhao, Li Hong Wang, and Zhen Gui Yuan

Subjects
010302 applied physics, Materials science, Mechanical Engineering, Metallurgy, Composite number, Alloy, chemistry.chemical_element, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Brinell scale, chemistry, Mechanics of Materials, 0103 physical sciences, engineering, General Materials Science, 0210 nano-technology, Tin
Abstract

The TiN-Al composite coatings on A356 alloy were successfully synthesized by mechanical alloying (MA) of Al, TiN and C powders under argon atmosphere. Meanwhile, the optimal parameters for mechanical milling processing were determined by changing the material ratio (Al: TiN: C), milling time and the ball-to-powder weight ratio, which might have a significant improvement on the wear resistance of A356 alloys. The microstructures and mechanical properties of A356 alloy samples with TiN-Al composite coatings were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) and Brinell hardness test. It was found that under the optimal conditions, i.e. the material ratio of (Al: TiN: C= 17.5:1.5:1), the ball-to-powder weight ratio of 14:1 and the milling duration of 12 h, the Brinell hardness of sample-6 could be remarkably increased to 143.80 HBW. With the TiN-Al coatings fabricated by MA process, the mechanical properties of aluminum alloys could be significantly improved.

Published
2017

3. Clinical features and prognostic factors of cervical villoglandular adenocarcinoma.

Author

Jia- Hua Chen, Hui Duan, Xiao- Bo Yu, Hong- Wei Zhao, Xu Chen, Pengfei Li, Zhi- Qiang Li, Bing- Xin Li, Lu- Yao Pan, Xiaojian Yan, and Chunlin Chen

Subjects
PROGNOSIS, LYMPHADENECTOMY, ADENOCARCINOMA, LAPAROSCOPIC surgery, LYMPH nodes, OVARIES
Abstract

Background Villoglandular adenocarcinoma is a rare sub- type of cervical adenocarcinoma. Objective To analyze the clinicopathological features and evaluate the prognosis of patients with villoglandular adenocarcinoma of the cervix. Methods Patient characteristics, procedure, pathology, and surgical outcomes were retrospectively reviewed in patients with villoglandular adenocarcinoma between November 2006 and June 2019 from multiple centers in China. In order to explore the difference between villoglandular adenocarcinoma and routine adenocarcinoma, patients (FIGO 2009 stage IA1-IB2) who had complete data during the same time period were included. Results A total of 60 patients with villoglandular adenocarcinoma and 104 with standard adenocarcinoma were included. The median age of the patients with villoglandular adenocarcinoma was 42 years (range 27--68). The most common 2009 FIGO stage was IB1 in 39 (65%) patients with villoglandular adenocarcinoma. A total of 23 patients underwent laparoscopic surgery (two total hysterectomies, 21 radical hysterectomies) and the other 37 patients underwent laparotomy (three total hysterectomies, 34 radical hysterectomies). A total of 56 patients underwent lymphadenectomy and three (5.4%) had positive lymph nodes. Fifteen (25%) patients had one or both ovaries preserved. Seven patients were lost to follow- up. The median follow- up time for the entire group was 50.2 months (range 5.1--154.6). No deaths or recurrences occurred. Excluding six patients with FIGO 2009 stage II, the 5- year disease- free survival of the 47 patients with villoglandular adenocarcinoma with FIGO 2009 stage I for whom there was follow- up, was significantly higher than that of the 104 patients with standard cervical adenocarcinoma (100% vs 92.2%, logrank p=0.039). However, the 5- year overall survival of the two groups did not differ (100% vs 95.7%, log- rank p=0.11). Conclusion Villoglandular adenocarcinoma has a favorable prognosis. Further studies are needed to provide more details of treatment strategies and prognosis. [ABSTRACT FROM AUTHOR]

Published
2021
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