Mumetaln.

Brit.

/ˈmjuːmɛtl/, U.S.

/ˈmjuˌmɛd(ə)l/

Forms: 1900s– Mumetal, 1900s– Mu-metal. Also with lower-case initial.

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek μ , metal n.

Etymology: < the name of the Greek letter μ (conventionally used to denote permeability: see mu n.¹) + metal n.

Engineering.

Any of a series of nickel-iron alloys containing approximately 75–78 per cent nickel, 4–6 per cent copper, and 1½–2 per cent chromium by weight, which are used to make transformer cores and magnetic shields because of their high permeability and low hysteresis loss in weak magnetic fields.A proprietary name in the United Kingdom.

ΘΚΠ

society > occupation and work > materials > derived or manufactured material > metal > alloy > [noun] > iron alloys

ferromanganese1864

manganeisen1881

ferro-alloy1888

silico-manganese1895

Mumetal1924

1924 Trade Marks Jrnl. 16 Apr. 858 Mumetal... Metallic alloys, unwrought or partly wrought. The Telegraph Construction and Maintenance Company, Limited,..London,..manufacturers.

1925 Jrnl. Iron & Steel Inst. 112 74 The first commercial application of high-frequency melting in Europe was made by a British firm for the preparation of nickel–iron alloys for submarine cables. The research work..quickly resulted in the perfection of a series of alloys known under the name of ‘Mumetal’.

1932 Discovery May 142/1 Pure iron, silicon–iron, permalloy, and mumetal are used because they can be magnetized and demagnetized without loss.

1973 Physics Bull. Dec. 719/2 Until now conventional recording heads have had cores of a soft magnetic material, typically ferrite or laminated mumetal.

1992 V. Capel Public Addr. Syst. vi. 83 It is virtually impossible to shield an input transformer from hum fields in mains-driven equipment with ordinary metal shielding. It must be of mu-metal.

This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).

单词	mumetal
释义	Mumetaln. Brit. /ˈmjuːmɛtl/, U.S. /ˈmjuˌmɛd(ə)l/ Forms: 1900s– Mumetal, 1900s– Mu-metal. Also with lower-case initial. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek μ , metal n. Etymology: < the name of the Greek letter μ (conventionally used to denote permeability: see mu n.¹) + metal n. Engineering. Any of a series of nickel-iron alloys containing approximately 75–78 per cent nickel, 4–6 per cent copper, and 1½–2 per cent chromium by weight, which are used to make transformer cores and magnetic shields because of their high permeability and low hysteresis loss in weak magnetic fields.A proprietary name in the United Kingdom. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > alloy > [noun] > iron alloys ferromanganese1864 manganeisen1881 ferro-alloy1888 silico-manganese1895 Mumetal1924 1924 Trade Marks Jrnl. 16 Apr. 858 Mumetal... Metallic alloys, unwrought or partly wrought. The Telegraph Construction and Maintenance Company, Limited,..London,..manufacturers. 1925 Jrnl. Iron & Steel Inst. 112 74 The first commercial application of high-frequency melting in Europe was made by a British firm for the preparation of nickel–iron alloys for submarine cables. The research work..quickly resulted in the perfection of a series of alloys known under the name of ‘Mumetal’. 1932 Discovery May 142/1 Pure iron, silicon–iron, permalloy, and mumetal are used because they can be magnetized and demagnetized without loss. 1973 Physics Bull. Dec. 719/2 Until now conventional recording heads have had cores of a soft magnetic material, typically ferrite or laminated mumetal. 1992 V. Capel Public Addr. Syst. vi. 83 It is virtually impossible to shield an input transformer from hum fields in mains-driven equipment with ordinary metal shielding. It must be of mu-metal. This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022). < n.1924
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