永磁体:历史与未来 基础科学 岳明,(美)刘,沈保根
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北京丰台
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作者岳明,(美)刘,沈保根
出版社科学出版社
ISBN9787030644381
出版时间2020-06
版次1
装帧平装
开本16
页数473页
定价248元
货号xhwx_1202083034
上书时间2024-06-27
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目录：
preface
chapter 1 millenniums of permanent mags: from passes to rare-earth mags 1
references 5
chapter 2 coercivity mechanisms in nanostructured permanent mags 7
2.1 introduction 8
2.2 hysteresis loo and a survey of various coercivity mechanisms 10
2.2.1 hysteresis loo 10
2.2.2 coherent rotation and domain wall motion 12
2.2.3 various modes of nucleation and nucleation expansion 14
2.2.4 numerical approaches and more advanced models 16
2.3 interface-pinning of well-oriented permanent magic systems 18
2.3.1 basic formulation 18
2.3.2 parison of nucleation and self-pinning fields 19
2.3.3 experimental evidence and parison with other theories 25
2.4 discussions and conclusions 26
2.4.1 single-phase versus two-phases 26
2.4.2 pinning versus nucleation 27
2.4.3 size e.ect and grain boundary enhancement 29
2.4.4 conclusions 30
references 31
chapter 3 sm-co high-temperature permanent mag materials 36
3.1 introduction 36
3.2 historical review of development of sm-co permanent mags 38
3.3 phase diagram and crystal structures 40
3.4 intrinsic magic properties of r-co pounds 42
3.5 sm-co permanent mags capable of operating up to 300 46
3.6 high-temperature sm2(co， fe， cu， zr)17-type mags capable of operating up to 550 51
3.6.1 effects of itions on high-temperature intrinsic coercivity of sm-tm permanent mags 52
3.6.2 new high-temperature sm2(co， fe， cu， zr)17-type mags 53
3.6.3 long-term thermal stability of new high-temperature permanent mags 56
3.6.4 abnormal temperature dependence of intrinsic coercivity 57
3.7 thermal stability， temperature coeffcient， and modeling of temperature-pensated mags 57
3.7.1 reversible and irreversible flux density loss 57
3.7.2 temperature coeffcient 59
3.7.3 modeling of temperature-pensated mags 62
3.8 nanograin structure， nanocrystalline， and nanoite sm-co magic materials 65
3.9 other sm-co permanent mag materials 72
3.10 prospects of future rare earth permanent mag materials 73
3.11 conclusions 76
references 77
chapter 4 ternary fe-rich r-fe-m intermetallics with the thmn12-type structure and their interstitial pounds 82
4.1 introduction 82
4.2 part one: ternary fe rich 1-12 pounds 85
4.2.1 structural and magic properties of y(mn1.xfex)12 which is the first synthesis of fe-rich 1-12 pounds 85
4.2.2 structural and magic properties of rfe12.xmx 90
4.2.3 structural and magic properties of rtife11 in parison with rtico11 and yti(fe1.xnix)11 90
4.3 part two: interstitial nitrogen atom e.ect on the 1-12 pounds and its applications 108
4.3.1 interstitial nitrogen atom e.ect on the 1-12 pounds 108
4.3.2 interstitial hydrogen (or carbon) atom e.ect on the 1-12 pounds 116
4.3.3 development of novel permanent mags based on r(fe，m)12nx 121
4.4 conclu remarks 129
references 130
chapter 5 mn-based permanent mags 134
5.1 introduction 135
5.2 mn-al hard magic phase 136
5.3 mnbi hard magic materials 147
5.4 mnxga magic materials 157
5.5 summary 164
references 164
chapter 6 anisotropic nanoite soft/hard multilayer mags 169
6.1 introduction 170
6.2 the anisotropic nd2fe14b based nanoite multilayer mags 171
6.3 anisotropic smco5 based nanoite permanent multilayer mags 204
6.4 anisotropic rare-earth free based nanoite permanent multilayer mags 211
references 218
chapter 7 nanocrystalline and nanoite permanent mags by melt spinning technique 223
7.1 melt-spinning technique 224
7.2 uniqueness in melt-spun materials 227
7.2.1 cooling control 229
7.2.2 amorphization and crystallization 232
7.2.3 phase formation 234
7.2.4 consolidation 236
7.3 melt-spun materials 241
7.3.1 single-phase nanocrystalline mags 241
7.3.2 nanoite mags 266
7.3.3 precipitation-hardening ribbons 288
7.4 magic phenomena in melt-spun mags 300
7.4.1 single-phase magic behavior 301
7.4.2 remanence enhancement 303
7.4.3 henkel plot 306
7.4.4 recoil loop 311
7.4.5 first-order reversal curve 317
7.4.6 coercivity and microstructure parameters 320
7.4.7 reversible and irreversible magization 323
7.5 summary and outlook 325
references 326
chapter 8 grain boundary restructuring and la/ce/y application in nd-fe-b mags 339
8.1 introduction 340
8.2 grain boundary restructuring of nd-fe-b sintered mags 341
8.2.1 fundamentals of grain boundary restructuring 341
8.2.2 (pr， nd)32:5fe62:0cu5:5 restructuring: high corrosion-resistant nd-fe-b 342
8.2.3 dy71:5fe28:5 restructuring: high-coercivity nd-fe-b 350
8.3 application of high-abundant la/y/ce in nd-fe-b mags 355
……
内容简介：
本书致力于提供永磁体在理论和实验研究方面的前沿进展。它涵盖了宽广的范围：从基本理论到优选技术，从传统磁体改进到新型磁体研发，从磁体的制造到回收利用。本书的主要内容包括：永磁体的矫顽力理论，各种优选永磁体的发展历程，以及磁体的制造和回收技术等。本书是"强磁场下的基础科学问题学科发展战略研究咨询项目"（沈保根院士负责）成果的汇集，各章作者均为在永磁基础研究领域一线科研人员，讨论的内容为当前国际相关领域的前沿。为便于国际交流，本书为英文写作。
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