MIL-HDBK-817, MILITARY HANDBOOK: SYSTEM DEVELOPMENT RADIATION HARDNESS ASSURANCE (08 FEB 1994)., The document is intended to address the planning, hardening, and management approaches required at the system level to ensure that the system level to ensure that the system is produced in compliance with survivability requirements. Provide guidance in defining HA activities commensurate with the threat nuclear weapon and space radiation environment and with the concept of balanced hardening to all hostile environments.

【英文标准名称】:Magneticpropertiesofmagneticallyhardmaterialsatelevatedtemperatures-Methodsofmeasurement
【原文标准名称】:升高温下硬磁材料的磁性能测量方法
【标准号】:IEC/TR61807-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-10
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC68
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;材料的磁性能;磁场强度;磁性材料;通量密度;测量设备;测量方法;永久磁铁;场强(电);测量技术;磁场;材料;偏振;磁性能;测量;电气工程;硬磁的;永磁性材料;去磁曲线
【英文主题词】:
【摘要】:Thepresenttechnicalreportprovidesmethodsformeasuringmagneticallyhardmaterials,atelevatedtemperatures.Magneticallyhardmaterials(permanentmagnetmaterials)areclassifiedinIEC60404-1andtheirpropertiesarespecifiedinIEC60404-8-1.ThemethodsofmeasurementofthemagneticpropertiesofmagneticallyhardmaterialsatroomtemperaturehavebeenspecifiedinIEC60404-5forclosedmagneticcircuitsandinIEC60404-7foropenmagneticcircuits,respectively.Theapplicationsofmagneticallyhardmaterialsarenowexpandingtoelevatedtemperaturesanditisthereforerequiredtospecifyandguaranteethemagneticpropertiesofthesematerialsovertheirworkingtemperaturerange.InIEC60404-8-1temperaturecoefficientsofremanence(orsaturation)andJ-coercivityhavebeenspecifiedinadditiontobasicpropertiessuchasmaximummagneticenergyproduct((BH)max),remanence(Br),S-coercivity(HcB).J-coercivity(HcJ),recoilpermeability(μrec)anddensity.
【中国标准分类号】:L19
【国际标准分类号】:29_030;17_220_20
【页数】:13P;A4
【正文语种】:英语