ʻO ka holomua hou i ka noiʻi anti-kahiko o nā mea aniani

I kēia mau lā, ua hui pū ka Institute of Mechanics of the Chinese Academy of Sciences me nā mea noiʻi ma ka home a ma waho e hana hou i ka holomua i ka anti-aging o nā mea aniani, a no ka manawa mua i hoʻokolohua ʻia i ke ʻano o ka ʻōpio o ke aniani metala maʻamau. kahi pālākiō manawa wikiwiki loa. ʻO nā hopena pili i kapa ʻia ʻo Ultrafast extreme rejuvenation o nā aniani metala ma ka hoʻoemi haʻalulu, i paʻi ʻia ma Science Advances (Science Advances 5: eaaw6249 (2019)).

ʻO ka mea aniani metastable he ʻano o ka wā kahiko i ka thermodynamic equilibrium state, a ma ka manawa like, ua hele pū ʻia me ka deterioration o nā waiwai waiwai. Eia nō naʻe, ma o ka hoʻokomo ʻana o ka ikehu o waho, hiki i ka mea aniani kahiko ke hoʻoulu hou i ke ʻano (rejuvenation). ʻO kēia kaʻina hana anti-ʻelemakule ma kekahi ʻaoʻao kōkua i ka ʻike kumu o ke ʻano paʻakikī paʻakikī o ke aniani, ma ka ʻaoʻao ʻē aʻe he kūpono ia i ka noi ʻenehana o nā mea aniani. I nā makahiki i hala iho nei, no nā mea aniani metala me nā manaʻo noi ākea, ua manaʻo ʻia kahi ʻano o nā ʻano hana hou e pili ana i ka deformation non-affine i mea e hoʻomalu pono ai i nā waiwai mechanical a me ke kino o nā mea. Eia nō naʻe, hana nā ʻano hana hou a pau ma mua o ke koʻikoʻi haʻahaʻa a koi aku i kahi manawa lōʻihi, a no laila he mau palena nui.

Noiʻi ma muli o ka lua-pahuʻia papa hopena 'enehana o ka mama kinoea pu mea, ua ike i ka typical zirconium-based metala aniani kiʻekiʻe koke rejuvenated i kahi kiʻekiʻe ma kahi o 365 nanoseconds (hoʻokahi miliona o ka manawa e pono ai no ke kanaka e blink. maka). Hoʻopilikia loa ʻia ʻo Enthalpy. ʻO ka luʻi o kēia ʻenehana, ʻo ia ka hoʻopili ʻana i kekahi mau GPa-level single-pulse loading a me transient automatic unloading i ke aniani metala, i mea e pale aku ai i ka hemahema o nā mea e like me nā kaula ʻili a me ka spallation; i ka manawa like, ma ka hoʻomalu ʻana i ka wikiwiki hopena o ka lele, ka metala ʻO ka wikiwiki o ka rejuvenation o ke aniani "freezes" ma nā pae like ʻole.

Ua hana nā mea noiʻi i kahi noiʻi piha e pili ana i ka ultra-wikiwiki rejuvenation kaʻina o ke aniani metala mai nā hiʻohiʻona o ka thermodynamics, multi-scale structure a me phonon dynamics "Bose peak", e hōʻike ana i ka rejuvenation o ka hale aniani mai nā nano-scale clusters. Hoʻokomo ʻia ka leo manuahi e ke ʻano "shear transition". Ma muli o kēia ʻano hana kino, ua wehewehe ʻia kahi helu Deborah ʻole, e wehewehe ana i ka hiki o ka manawa o ka ultra-wikiwiki rejuvenation o ke aniani metala. Ua hoʻonui kēia hana i ka manawa no ka rejuvenation o nā hale aniani metala ma ka liʻiliʻi he 10 kauoha o ka nui, hoʻonui i nā kahua noi o kēia ʻano mea, a hoʻonui i ka ʻike o ka poʻe i ka ultrafast dynamics o ke aniani.