MIL-HDBK-704-8
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来源:标准资料网
MIL-HDBK-704-8, DEPARTMENT OF DEFENSE HANDBOOK: GUIDANCE FOR TEST PROCEDURES FOR DEMONSTRATION OF UTILIZATION EQUIPMENT COMPLIANCE TO AIRCRAFT ELECTRICAL POWER CHARACTERISTICS 28 VDC (PART 8 OF 8 PARTS) (9 APR 2004)., This handbook provides guidance on test procedures for demonstration of 28 VDC utilization equipment to determine compliance with the applicable edition of MIL-STD-704. MIL-HDBK-704-8 is Part 8 in a series of 8 Parts. Part 8 describes the test methods and procedures to demonstrate that 28 VDC utilization equipment is compatible with the electric power characteristics of MIL-STD-704. These series of handbooks and MIL-STD-704 are companion documents.
【英文标准名称】:StandardTestMethodsforThicknessofDiffusionCoating
【原文标准名称】:扩散层厚度的的标准试验方法
【标准号】:ASTMC664-1987(2005)
【标准状态】:现行
【国别】:
【发布日期】:1987
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:B08.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:扩散;厚度;覆层;试验
【英文主题词】:
【摘要】:Adiffusioncoatingisoneproducedbycausinganelementorelementstoreactwithordiffuseinto,orboth,thesurfaceofametallicsubstrate,thuschemicallyalteringthesubstrateadjacenttothesurface.Toappreciatethesignificanceofcoatingthicknessmeasurementsonemustunderstandthecontributionstoaparticularcoatingofsolid-solutionzonesinthesubstrateandreactionproductssuchasintermetalliccompounds.1.1Thesetestmethodscovertwoproceduresformeasuringthethicknessofdiffusioncoatings.1.2TestMethodAisthedeterminationofthedimensional-changethickness,definedasthedifferenceinthethicknessofthepartbeforeandaftercoating.(Thetermsmicrometerthicknessandpartgrowthareconsideredsynonymouswithdimensionalchangethickness.)1.3TestMethodBisthedeterminationoftotalcoatingthickness,definedasthedistancebetweentheobservablyunaffectedsubstrateandtheexteriorsurfaceofthecoating.Thisincludesthetotalofallincludedphases,zonesandlayers.(Thetermcasedepthisconsideredtobesynonymouswithtotalcoatingthickness.)Thetotalcoatingthicknessisdeterminedbycross-sectioningthecoating,preparingametallurgicalmountandmicroscopicallymeasuringthecoatingthickness.1.4Thetotalcoatingthicknessasdeterminedmicroscopicallyfromacross-sectionwillusuallybegreaterthan,orequalto,thedimensionalchangethicknessdeterminedbypartgrowth.Whenthecoatingisproducedprimarilybyreactionwiththesubstrate,thesubstrate-coatinginterfacerecedesasthesubstrateisconsumedinthereaction.Insuchcasesthedifferencebetweenthetotalcoatingthicknessandthedimensionalchangethicknessisthethicknessofthesubstrateconsumed.1.5Diffusioncoatingsareusuallyformedatelevatedtemperaturesforserviceatelevatedtemperatures.Thismeansthatdiffusioncoatingsaredynamicsystemswhicharecontinuallyundergoingchangeswhileinanelevated-temperatureenvironment.Itisnecessarytoknowthatcertainphasesaregrowingattheexpenseofothersandtoknowtheprevioushistoryofacoatingtounderstandthesignificanceofcoatingthicknessdata.1.6ValuesinSIunitsaretoberegardedasthestandard.Inch-poundunitsareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A52
【国际标准分类号】:17_040_20
【页数】:2P.;A4
【正文语种】:
基本信息
标准名称: | 良好农业规范 第7部分:牛羊控制点与符合性规范 |
英文名称: | Good agricultural practice—Part 7:Cattle and sheep control points and compliance criteria |
中标分类: |
农业、林业 >>
畜牧 >>
畜牧综合 |
ICS分类: |
|
替代情况: | 被GB/T 20014.7-2008替代 |
发布部门: | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
发布日期: | 2005-12-31 |
实施日期: | 2006-05-01 |
首发日期: | 2005-12-31 |
作废日期: | 2008-10-01 |
主管部门: | 国家标准化管理委员会 |
提出单位: | 中国国家认证认可监督管理委员会 |
归口单位: | 中国国家标准化管理委员会 |
起草单位: | 国家认监委注册部、湖北出入检验检疫局等 |
起草人: | 徐共和、王加启、佘锐萍、叶道成、章红兵等 |
出版社: | 中国标准出版社 |
出版日期: | 2006-05-01 |
页数: | 16开, 页数:11, 字数:19千字 |
计划单号: | 20051791-T-469 |
适用范围
GB/T 20014的本部分规定了牛羊生产良好农业规范的要求。本部分适用于对牛羊生产良好农业规范的符合性判定。
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所属分类: 农业 林业 畜牧 畜牧综合