预氧化及预氧化-还原处理改善NdFeB微晶磁粉的抗氧化性能

中国腐蚀与防护学报

1999, Vol. 19

Issue (2): 125-128

研究简报

本期目录 | 过刊浏览

预氧化及预氧化-还原处理改善NdFeB微晶磁粉的抗氧化性能

闻获江;刘晓波

苏州大学化学化工学院

EFFECT OF PREOXIDATION AND PREOXIDATION-REDUCTION TREATMENT ON OXIDATION RESISTANCE OF NdFeB MINI-CRYSTAL MAGNETIC POWDER

Dijiang Wen;

全文: PDF(82 KB)

摘要: 以重铬酸钾为氧化剂及亚硫酸氢钠为还原剂，分别在强氧化条件下及氧化-还原条件下处理快淬NdFeB微晶磁粉表面，研究了处理后磁粉的热粉氧化用及抗氧化机理。结果表明，预氧化及预氧化-还原处理能使磁粉的抗氧化性能明显提高。

关键词 ： NdFeB, 微晶磁粉, 氧化, 表面处理

Abstract：By using potassium dichromate as oxidizer and sodium bisulfite as reductor,the surface of rapidly chilled NdFeb mini-crystal magnetic powder was treated under the strong oxidation condition.The hot oxidation mechanism of the treated magnetic powders was studied.The results of weight gain during dry and wet oxidation tests indicated that the above-mentioned preoxidation and preoxidation-reduction treatment can considerably inprove the oxidation resistance of the magnetic powder.For example,the weight gains reached 0.024% and 0.077% after oxidation at 430℃ and 500℃ for 1 hr,respectively,for the treated powder,while 2.3% and 3.83% for the untreated powder.During the wet oxidation test (80℃,RH90%,100hr),the corresponding data were 0.067% and 7.30%.The treatments increased B,H,(BH)max of the experimental cohesional magnet by 60%-100%.XPS of the magnetic powder before and after the treatment were compared and the results showed that Nd,Fe on the surface of untreated powder were in oxidized states and the surface of the treated power was covered by chromium oxide.The presence of the latter had the action of antioxidation and therefore enhanced the magnetic capability of the cohesional magnet.

Key words： NdFeB Mini-crystal magnetic powder oxidation surface treatment

收稿日期: 2005-07-22

通讯作者: 闻获江

Corresponding author: Dijiang Wen

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	闻获江
	刘晓波
44.8K

引用本文:

闻获江; 刘晓波 . 预氧化及预氧化-还原处理改善NdFeB微晶磁粉的抗氧化性能[J]. 中国腐蚀与防护学报, 1999, 19(2): 125-128 .
Dijiang Wen. EFFECT OF PREOXIDATION AND PREOXIDATION-REDUCTION TREATMENT ON OXIDATION RESISTANCE OF NdFeB MINI-CRYSTAL MAGNETIC POWDER. J Chin Soc Corr Pro, 1999, 19(2): 125-128 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1999/V19/I2/125

1 Mazany A M, Dickens Jr E D. J. Appl. Phys., 1991, 69(8): 5534
2 Fujita A. IEEE Thans on MAGS in Jap. 1991, 16(3): 202
3 Yaniamoto H. IEEE Thans on MAGS in Jap. 1990, 5(5): 389
4 Willman C J, Narasimhan K S V L. J. Appl, Phys., 1987, 61(8): 3766
5 Tokuhara K, Hirosawa S. J. Appl. Phys, 1991, 69(8): 5521
6 Wen Dijiang, Liu Xiaobo, Xiong Chuanxi. Journal of Rare Earths, 1997, 15(3): 186S

[1]	魏征, 马保吉, 李龙, 刘潇枫, 李慧. 镁合金表面超声滚压预处理对微弧氧化膜耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2021, 41(1): 117-124.
[2]	刘晓, 王海, 朱忠亮, 李瑞涛, 陈震宇, 方旭东, 徐芳泓, 张乃强. 电站用奥氏体耐热钢HR3C与Sanicro25在超临界水中的氧化特性[J]. 中国腐蚀与防护学报, 2020, 40(6): 529-538.
[3]	谢冬柏, 洪昊, 王文, 彭晓, 多树旺. 模拟燃烧环境介质和温度对不锈钢表面氧化物形态的影响研究[J]. 中国腐蚀与防护学报, 2020, 40(4): 358-366.
[4]	曹京宜, 方志刚, 陈晋辉, 陈志雄, 殷文昌, 杨延格, 张伟. 5083铝合金表面单致密微弧氧化膜的制备及其性能研究[J]. 中国腐蚀与防护学报, 2020, 40(3): 251-258.
[5]	王廷勇, 董如意, 许实, 王辉. 石墨烯改性Ti/IrTaSnSb-G金属氧化物阳极在低温和低盐NaCl溶液中的电化学性能[J]. 中国腐蚀与防护学报, 2020, 40(3): 289-294.
[6]	方旭东, 刘晓, 徐芳泓, 李瑞涛, 朱忠亮, 张乃强. 超超临界电站国产奥氏体钢C-HRA-5在超临界水中的氧化特性[J]. 中国腐蚀与防护学报, 2020, 40(3): 266-272.
[7]	王英君, 刘洪雷, 王国军, 董凯辉, 宋影伟, 倪丁瑞. 新型高强稀土Al-Zn-Mg-Cu-Sc铝合金的阳极氧化及其抗腐蚀性能研究[J]. 中国腐蚀与防护学报, 2020, 40(2): 131-138.
[8]	秦越强, 左勇, 申淼. FLiNaK-CrF₃/CrF₂氧化还原缓冲熔盐体系对316L不锈钢耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2020, 40(2): 182-190.
[9]	郑艳欣, 刘颖, 宋青松, 郑峰, 贾玉川, 韩培德. 含铁铜基陶瓷复合材料高温氧化行为与耐磨性研究[J]. 中国腐蚀与防护学报, 2020, 40(2): 191-198.
[10]	范益,陈林恒,蔡佳兴,代芹芹,马宏驰,程学群. 热轧AH36船板钢在室内仓储条件下的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2020, 40(1): 10-16.
[11]	徐勋虎,何翠群,向军淮,王玲,张洪华,郑晓冬. Co-20Re-25Cr-1Si合金在0.1 MPa纯O₂中的高温氧化行为[J]. 中国腐蚀与防护学报, 2020, 40(1): 75-80.
[12]	姜冬雪,付颖,张峻巍,张伟,辛丽,朱圣龙,王福会. 钛合金表面Al₂O₃陶瓷膜制备及性能研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 469-476.
[13]	王毅,张盾. 铋系可见光催化海洋防污材料研究进展[J]. 中国腐蚀与防护学报, 2019, 39(5): 375-386.
[14]	魏欣欣,张波,马秀良. FeCr₁₅Ni₁₅单晶600 ℃下热生长氧化膜的TEM观察[J]. 中国腐蚀与防护学报, 2019, 39(5): 417-422.
[15]	肖金涛,陈妍,邢明秀,鞠鹏飞,孟引根,王芳. 工艺参数对2195铝锂合金阳极氧化膜的耐蚀性影响[J]. 中国腐蚀与防护学报, 2019, 39(5): 431-438.

Viewed

Full text

Abstract

Cited

Shared

Discussed