重庆体彩

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ZUOZHE:Paul Gabrielsen / YOUTADAXUE(University of Utah)

在应变下模拟3纳米晶粒大小的镍。彩色线表示部分或全部晶粒错位。图片来源:犹他大学

ZAIYINGBIANXIAMONI3NAMIJINGLIDAXIAODENIE。CAISEXIANBIAOSHIBUFENHUOQUANBUJINGLICUOWEI。TUPIANLAIYUAN:YOUTADAXUE

NIKANBUDAOTAMEN,DANSHIZHOUWEIDEDADUOSHUJINSHU(YINGBI,YINQI,SHENZHISHIZHICHENGJIANZHUWUHELIJIAOQIAODEGANGLIANG)DOUYOUWEIXIAODEJINSHUKELIZUCHENG。ZAIZUGOUQIANGDADEXIANWEIJINGXIA,NINKEYIKANDAOLEISIHUAGANGYANTAIMIANDEHUSUOJINGTI。

CAILIAOKEXUEJIAZAOJIUZHIDAO,SUIZHEZUCHENGJINSHUDEJINGLICHICUNBIANXIAO,JINSHUBIANDEGENGJIANGU。RUGUOJINGLIDEZHIJINGXIAOYU10NAMI,ZECAILIAOHUIJIAORUO,YINWEIJURENWEITAMENHUIXIANGSHAZISHUNZHESHAQIUHUALUOYIYANGHUAGUOBICI。JINSHUDEQIANGDUYOUJIXIAN。

DANSHIYOUYOUTAZHOUDAXUEQIANBOSHIHOUXUEZHEZHOUXIAOLING(YINYI,XIANWEIPULINSIDUNDAXUE),DIZHIXUEFUJIAOSHOULUOEER·GONGCHENG(Lowell Miyagi)HEZHONGGUOSHANGHAIGAOYAKEXUEJISHUGAOJIYANJIUZHONGXINDECHENBIN(YINYI)LINGDAODESHIYANBIAOMING,ZHEIBINGFEIZONGSHIRUCI。QINGKUANG—ZAIZHIJINGWEI3NAMIDENIEYANGPINZHONG,ZAIGAOYAXIA,YANGPINDEQIANGDUSUIZHEJINGLICHICUNDEJIANXIAOERCHIXUZENGJIA。

重庆体彩ZHOUHEGONGCHENGSHUO,JIEGUOSHIDUIJINSHUJINGLIDEGEGEYUANZIRUHEXIANGHUZUOYONGDEXINRENSHI,YIJIYIZHONGLIYONGZHEIXIEWULIXUEFANGFAHUODECHAOQIANGJINSHUDEFANGFA。TAMENDEYANJIUSHIYUJIAZHOUDAXUEBOKELIFENXIAOHEZHONGGUODAXUEDETONGSHIJINXINGDE,FABIAOZAI《ZIRAN》ZAZHISHANG。

“WOMENDEYANJIUJIEGUOBIAOMINGLEZHIZAOCHAOZHANGJINSHUDEKENENGCELVE,”ZHOUSHUOGUOQU,YANJIURENYUANRENWEIZUIQIANGDEJINGLICHICUNDAYUEWEI10-15NAMI。DANXIANZAIWOMENFAXIAN,WOMENKEYIZAI10NAMIYIXIAZHIZAOCHUGENGQIANGDEJINSHU。”

超越 Hall-Petch

重庆体彩GONGCHENGSHUO,DUIYUDADUOSHUJINSHUWUTIERYAN,JINSHUKELIDEDAXIAOYUEWEIJIBAIDAOJIBAIWEIMI,DAYUESHIYIGENTOUFADEZHIJING。TASHUO:“GAODUANCANJUTONGCHANGHUIJUYOUGENGXI,GENGJUNYUNDEKELIJIEGOU,ZHEIKEYISHININHUODEGENGHAODEBIANYUAN。”

JINSHUQIANGDUHEJINGLICHICUNZHIJIANXIANQIANLIJIEDEGUANXICHENGWEIHUOER-PAQIGUANXI。GENJUHall-PetchDEYANJIU,JINSHUQIANGDUSUIZHEJINGLICHICUNDEJIANXIAOERZENGJIA,XIAJIANGDAO10-15NAMIDEJIXIAN。ZHIJINGZHIYOUDAYUE4DAO6GUDNALIAN。DIYUGAIJIXIANDEJINGLICHICUNBINGMEIYOUNEIMEQIANG。YINCI,WEILESHIQIANGDUZUIDAHUA,YEJINXUEJIAJIANGXUNQIUZUIXIAODEYOUXIAOJINGLICHICUN。

ZHOUSHUO:“XIHUAJINGLICHICUNSHITIGAOQIANGDUDEHAOFANGFA。” “YINCI,GUOQUFAXIANZHEIZHONGJINGLIXIHUAFANGFABUZAISHIYONGYUDIYULINJIEJINGLICHICUNDEZUOFA,SHIZAILINGRENJUSANG。”

重庆体彩DIYU10NAMIRUOHUADEJIESHIYUJINGLIBIAOMIANXIANGHUZUOYONGDEFANGSHIYOUGUAN。GONGCHENGSHUO,GUWUDEBIAOMIANYUNEIBUDEYUANZIJIEGOUBUTONG。ZHIYAOJINGLITONGGUOMOCALIBAOCHIZAIYIQI,JINSHUJIUHUIBAOCHIQIANGDU。DANSHIRENMENRENWEI,ZAIJINGLIJIAOXIAODEQINGKUANGXIA,JINGLIHUIZAIYINGLIZUOYONGXIAXIANGHUHUADONG,CONGERDAOZHIJINSHUQIANGDUJIANGDI。

DANSHI,YOUYUJISHUSHANGDEXIANZHI,YIQIANWUFAZAINAMIKELISHANGJINXINGZHIJIESHIYAN,CONGERXIANZHILEDUINAMIJIKELIXINGWEIDELEJIEYIJIZAIHall-PetchJIXIANYIXIASHIFOURENGYOUWEILIYONGDEQIANGDU。 “YINCI,WOMENSHEJILEZHEIXIANGYANJIULAICELIANGNAMIJINSHUDEQIANGDU,” ZhouSHUO。

在压力之下

YANJIURENYUANCESHILENIEDEYANGPIN,NIESHIYIZHONGKEYONGYUGEZHONGNAMIKELIDECAILIAO,QICHICUNKEDIZHI3NAMI。TAMENDESHIYANBAOKUOJIANGGEZHONGJINGLIDUDEYANGPINZAIGAOYAXIAZHIYUZUANSHIZHENSHIZHONG,BINGSHIYONGXSHEXIANYANSHEGUANCHAMEIGEYANGPINZAINAMIJIFASHENGDEQINGKUANG。

GONGCHENGSHUO:“RUGUONINCENGJINGWANGUODANHUANG,ZEKENENGYIJINGYONGLILADEZUYISHIDANHUANGHUIHUAI,YIZHITAWUFAFAHUIYINGYOUDEZUOYONG。” “ZHEIJIBENSHANGJIUSHIWOMENZAIZHEILIYAOCELIANGDE;WOMENYAODUOMENULIDITUIDONGZHEIZHONGNIE,ZHIDAOWOMENJIANGQIBIANXINGCHAOGUONENGGOUHUIFUDECHENGDUWEIZHI。”

QIANGDUYIZHIZENGJIADAOZUIXIAODEKEYONGLIDU。 3NAMIYANGPINCHENGSHOULE4.2JIPASIKADELI(DAYUEDENGYUSHIZHI10,000BANGDAXIANGZAIYIGEGAOGENXIESHANGBAOCHIPINGHENGDELI),RANHOUBUKENIDIBIANXING。ZHEIBISHANGYEJIJINGLICHICUNDENIEQIANGSHIBEI。

重庆体彩GONGCHENGSHUO,ZHEIBINGBUSHIHUOER-PAQIGUANXIPOLIEDEYUANYIN,ERSHIZAISHIYANTIAOJIANXIA,KELIZHIJIANDEXIANGHUZUOYONGFANGSHISHIBUTONGDE。GAOYAKENENGKEFULEJINGLIHUADONGDEYINGXIANG。

TASHUO:“RUGUOJIANGLIANGGEJINGLIZHENZHENGDITUIZAIYIQI,ZETAMENHENNANBICIHUAGUO,YINWEIJINGLIZHIJIANDEMOCABIANDALE,BINGQIEKEYIYIZHIDAOZHIZHEIZHONGRUOHUADEJINGLIBIANJIEHUADONGJIZHI。 ”

DANGZAI20nmYIXIADEJINGLICHICUNCHUYIZHIJINGJIEHUADONGSHI,YANJIURENYUANGUANCHADAOYIZHONGXINDEYUANZIJIBIANXINGJIZHI,GAIJIZHIDAOZHILEZUIXIJINGLIYANGPINDEJIDUANQIANGHUA。

超强的可能性

ZHOUSHUO,ZHEIXIANGYANJIUDEYIXIANGJINZHANSHITAMENDEFANGFAYIQIANSUOWEIYOUDEFANGSHICELIANGLENAMIJICAILIAODEQIANGDU。

GONGCHENGSHUO,LINGYIZHONGJINBUSHIKAOLVQIANGHUAJINSHUDEXINFANGFA,JIDUIJINSHUDEJINGLIBIAOMIANJINXINGJIAGONGYIYIZHIJINGLIDEHUADONG。

重庆体彩“ZAIGONGYESHANG,YALIZAIZHEIXIESHIYANZHONGBINGBUGAO,ZAIGONGYESHANGMEIYOUHENDUOYINGYONG,DANSHITONGGUOXIANSHIYALISHIYIZHIJINGJIEBIANXINGDEYIZHONGFANGFA,WOMENKEYIKAOLVCAIYONGQITAFANGFALAIYIZHIZHEIZHONGBIANXING,YEXUSHISHIYONGFUZADEWEIGUANJIEGOUNINDEJINGLIXINGZHUANGHUIZUZHIJINGLIXIANGHUHUAGUO。”

重庆体彩More information: Zhou, X., Feng, Z., Zhu, L. et al. High-pressure strengthening in ultrafine-grained metals. Nature (2020). doi.org/10.1038/s41586-020-2036-z

YUANWENLIANJIE:http://phys.org/news/2020-02-super-small-strong-metals.html

SHENGMING:BENWENYOUJIANGSUBEILANGXINNENGYUANBIANYI,ZHONGWENNEIRONGJINGONGCANKAO,YIQIENEIRONGYIYINGWENYUANBANWEIZHUN。


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