共查询到19条相似文献,搜索用时 164 毫秒
1.
2.
3.
4.
5.
前言铁-镍软磁合金具有许多优良的性能,在工业上广泛用作软磁材料、磁致伸缩材料、热敏感元件等。和 Cr-Ni 系材料 相似文献
6.
最近十年来纳米磁性材料已经获得了广泛的应用.本文详细论述了由两个铁磁相组成的新型纳米晶软磁合金在理论研究和实际应用方面所取得的重要成果.重点介绍了随机各向异性模型在解释这类纳米晶软磁合金的微结构特征和磁性能方面的成功应用,以及各种纳米晶软磁合金,包括Fe-Si-B-Cu-Nb纳米晶合金、Fe (Co)-Zr-B-(Cu)纳米晶合金、Fe-M-N, C (M = Zr, Hf, Ta, Nb)薄膜、软磁颗粒膜、双相非晶态薄膜和磁性多层膜作为高频软磁材料应用的最新进展情况. 相似文献
7.
8.
9.
10.
11.
注射成形Fe-50%Ni软磁合金的微观结构与性能 总被引:3,自引:0,他引:3
Fe—50%Ni合金是一种典型的高磁导率和低矫顽力软磁材料,有着广阔的应用前景。本实验采用注射成形方法制取Fe—50%Ni生坯,研究了烧结工艺对最终产品性能及微观组织的影响,并分析了影响产品磁性能的一些主要因素。实验表明烧结温度的提高和烧结时间的延长能够较好改善产品的力学性能;密度是影响产品磁性能的主要因素,杂质(主要为C、O、N)的含量和晶粒尺寸对刺磁、最大磁导率和矫顽力也有较大的影响;通过注射成形方法制取的Fe—50%Ni,其性能要优于采用粉末冶金方法制造的Fe-50%Ni。 相似文献
12.
13.
14.
15.
16.
《IEEE journal of selected topics in quantum electronics》2006,12(5):970-982
In this paper, we propose powder metallurgy for optoelectronic packages in order to reduce the cost of laser packages. Conventional die compaction (DC) and metal injection molding (MIM) are used for the shaping of powder metallurgy. The distinguishing types of inherent porosity in DC and MIM steels have their respective effects on the defect mechanisms of laser welding joints. For DC steel with 85% relative density and continuous porosity, the rising gas pressure pushes the molten metal out of the welding regions, resulting in weak and unstable welding joints. For MIM steel with more than 95% relative density, the laser power dominates the defect mechanisms, and the defect-free welding joints with optical spot size of$400 mu$ m can be attained by using laser power of less than 1.0 kW. Although elimination of inherent porosity in MIM steel under optimum welding condition can give rise to additional postwelding-shift (PWS), it is still controlled to less than$2 mu$ m, resulting in optical coupling loss of less than 15%. The advantage of applicability of the MIM method to several materials makes it possible to employ SS316L, Kovar, and Invar, which have the characteristic of better property for laser welding but difficult machining, as the metal housing in low-cost lightwave communication system. Thus, using MIM Invar with low coefficient of thermal expansion can minimize the tracking error, which is an important issue for bidirectional and triple-directional optoelectronic packages. The reliability data demonstrate that the laser modules using MIM steel as construction housing are stable and reliable. 相似文献
17.
18.
19.
用传统的合金铸锭工业生产高性能Nd-Fe-B烧结磁体的方法 总被引:1,自引:0,他引:1
利用改进的传统粉末冶金工艺(铸锭热处理、氢爆、改进型气流磨设备以及在气流磨中掺入添加剂等)。在无严格的防氧保护情况下,从传统合金铸锭出发,工业化生产出具胡高耐蚀性的N48-50档烧结Nd-Fe-B磁体。 相似文献