1,723,583 research outputs found
The Friction And Wear Characteristic Of Fe-based P/M Materials In Scroll Compressor
Full text linkWith the development of materials science and technology, Iron-based powder metallurgy (P/M) antifriction materials gradually used to scroll compressor. In this paper, three kinds of Iron-based powder metallurgy antifriction materials, which are Fe-C-Cu, Fe-C-Cu-Ni-Mo and Fe-P were prepared by the common compacting sintering method. Microstructure and mechanical properties were studied, tribological properties were tested on the friction tester, and surface topographical characteristics and wear mechanism of the Iron-based powder metallurgy materials antifriction were observed and analyzed by scanning electron microscope (SEM). The results showed that, the strength of Fe-C-Cu and Fe-C-Cu-Ni-Mo are higher than Fe-P. The microstructure of Fe-C-Cu and Fe-C-Cu-Ni-Mo are mainly composed of pearlite, Fe-P is ferrite. The impact toughness of Fe-P is better than the other two. Compared the tribological properties of aluminum alloys YZAlSi11Cu3 and powder metallurgy antifriction materials under oil lubrication condition, Fe-C-Cu and Fe-C-Cu-Ni-Mo have excellent wear resistance. The wear rate of Fe-C-Cu-Ni-Mo is equivalent to one sixth of YZAlSi11Cu3. The wear mechanism of YZAlSi11Cu3 was deformation and adhesion. Powder metallurgy antifriction materials were dominated by fatigue and deformation, and accompanied by a small amount of abrasive wear
Spatial localization of quantized states responsible for sharp optical transition in AlGaN/GaN superlattice
No full textEdward Denison, Guang Yu Ren, Luke Him Sau Architect: China’s Missing Modern
No full textThis book by Edward Denison and Guang Yu Ren is one of the first of its kind, focusing on the biography of a first-generation architect from twentieth-century China. Like his fellow architects of that period, Luke Him Sau (Lu Qianshou, 陸謙受, 1904-1991) belonged to a group of architects educated at a Western school with a formal academic tradition. In late 1930s this generation designed the curricula for the architectural education system in China according to their experience in the West. The ..
First-principles study of crystal structure, electronic structure, and second-harmonic generation in a polar double perovskite Bi2ZnTiO6
No full textA new genus with one new species of Phaloriinae from western Yunnan, China (Orthoptera: Phalangopsidae: Phaloriinae)
No full textChen, Guang-Yu, Xu, Yue, Liao, Wang, He, Zhu-Qing (2019): A new genus with one new species of Phaloriinae from western Yunnan, China (Orthoptera: Phalangopsidae: Phaloriinae). Zootaxa 4565 (3): 443-446, DOI: 10.11646/zootaxa.4565.3.1
A new species of Teleogryllus (Teleogryllus) Chopard, 1961 from Yunnan, China (Orthoptera: Gryllidae: Gryllinae)
No full textLiu, Yun-Fei, Shen, Chu-Ze, Xu, Yue, Chen, Guang-Yu, He, Zhu-Qing (2018): A new species of Teleogryllus (Teleogryllus) Chopard, 1961 from Yunnan, China (Orthoptera: Gryllidae: Gryllinae). Zootaxa 4531 (1): 117-122, DOI: 10.11646/zootaxa.4531.1.
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