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电镜相机故障诊断及维修一例
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作者 陈大兴 《分析仪器》 CAS 2024年第4期101-104,共4页
电镜相机是透射电镜的重要组件,常常用于材料和组织细胞的观察。相机采用光电信号转换原理产生图像。相机闪烁体表面要求洁净,不能有污染物,若有污染物会对图像质量产生影响。本文介绍一例电镜相机的维修案例,分析故障现象产生原因及排... 电镜相机是透射电镜的重要组件,常常用于材料和组织细胞的观察。相机采用光电信号转换原理产生图像。相机闪烁体表面要求洁净,不能有污染物,若有污染物会对图像质量产生影响。本文介绍一例电镜相机的维修案例,分析故障现象产生原因及排除,最后对本案例进行分析讨论。 展开更多
关键词 维修 电镜相机
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Analysis of the Mechanical Properties of the Sintered Composite FeCuC in Two Different Atmospheres
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作者 Clayton Andre de Oliveira Motta Jose de Souza +5 位作者 Marcelo Salvador Coser Alex Fabiano Bueno Lirio Schaeffer Bernardo Poras Reis Hamudy Munir Abou Arabi Lucas Soares de Almeida 《Journal of Mechanics Engineering and Automation》 2015年第1期33-38,共6页
This study aimed to analyze the mechanical properties of the compound FeCuC when compacted at varying pressures and sintered in two different types of furnaces. Besides the different models of furnace, the working atm... This study aimed to analyze the mechanical properties of the compound FeCuC when compacted at varying pressures and sintered in two different types of furnaces. Besides the different models of furnace, the working atmospheres were varied: one is being composed with argon gas and another constituted with a balancing nitrogen and hydrogen. Atmospheres vary with the amount of production and the type of equipment used. The compound generated is used in the manufacture of rings for mechanical seals and is currently manufactured by the sintering process in passing furnace. The sintering was performed in a static furnace with argon atmosphere and compared with the same compound sintered in passage furnace with hydrogen and nitrogen atmosphere. The analysis of the properties of the tested material was performed with the aid of metallography using a scanning electron microscope, which verified the particle size distribution, chemical elements and pores present. Brinell hardness and Vickers micro hardness tests were also used to analyze the properties of this material after completion of the two processes. Thus, the research carried out has shown that variations may occur in the mechanical properties when processed in different furnace types and different sintering atmospheres. 展开更多
关键词 Sintering furnaces FeCuC work atmosphere
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