aging
n.
老化,成熟的过程
v.
使变老
(1)Thestorageofporcelainenamelslipsorpowdersbeforeuse.
(2)Thechangeoccurringinporcelainenamelslipsorpowderswiththelapseoftime.
(3)Inheattreatment,achangeinthepropertiesofcertainmetalsandalloysthatoccursatambientormoderatelyelevatedtemperaturesafterhotworkingoraheattreatment(quenchaginginferrousalloys,naturalorartificialaginginferrousandnonferrousalloys)oraftercoldworking(strainaging).Thechangeinpropertiesisoften,butnotalways,duetoaphasechange(precipitation),butneverinvolvesachangeinchemicalcompositionofthemetaloralloy.