| 2 | 1/1 | 返回列表 |
| 查看: 452 | 回復: 1 | |||
csuhcb2000榮譽版主 (文壇精英)
|
[交流]
新開發(fā)純碳材料具極佳防震特性 已有1人參與
|
|
新開發(fā)純碳材料具極佳防震特性 日本研究者新近開發(fā)出一種純碳材料,這種材料具有極佳防震特性,不僅有延展能力,可自行恢復原狀,而且耐寒耐熱,有望應用于航空工業(yè)及汽車制造業(yè)。 日本產(chǎn)業(yè)技術綜合研究所材料科學家許明(音譯)12月2日告訴路透社記者,這種新型材料有如濃稠的蜂蜜,可伸展,可自行復原。 “它就像是一種有孔的金屬海綿,它由數(shù)以萬億計直徑為5納米的碳管組成,當你拉伸它然后松手,它會自己慢慢恢復原狀,”徐明說。 定于3日出版的《科學》雜志說,由于這種材料具有良好延展性,因此具有極佳防震性能。同時,在有氧環(huán)境中,它可以耐受的溫度范圍為零下196攝氏度至1000攝氏度。 “這是一種全新和獨特的材料。它可以用于太空領域,用于制造太空飛船或火箭的燃料箱,也可以用于制造汽車引擎,用以避震,”徐明說,“現(xiàn)階段,還沒有其他材料能夠具備相同特性! 他說,新材料的延展特性有些像橡膠,但它又具有良好的導電性,因此應用范圍比橡膠更廣泛。(來源:新華社) Carbon Nanotubes with Temperature-Invariant Viscoelasticity from –196° to 1000°C Ming Xu1, Don N. Futaba1,*, Takeo Yamada1, Motoo Yumura1 and Kenji Hata1,2,* + Author Affiliations 1Technology Research Association for Single Wall Carbon Nanotubes (TASC) and Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8565, Japan. 2Japan Science and Technology Agency (JST), Kawaguchi, 332-0012, Japan. *To whom correspondence should be addressed. E-mail: kenji-hata@aist.go.jp (K.H.); d-futaba@aist.go.jp (D.N.F.) Abstract Viscoelasticity describes the ability of a material to possess both elasticity and viscosity. Viscoelastic materials, such as rubbers, possess a limited operational temperature range (for example, for silicone rubber it is –55° to 300°C), above which the material breaks down and below which the material undergoes a glass transition and hardens. We created a viscoelastic material composed from a random network of long interconnected carbon nanotubes that exhibited an operational temperature range from –196° to 1000°C. The storage and loss moduli, frequency stability, reversible deformation level, and fatigue resistance were invariant from –140° to 600°C. We interpret that the thermal stability stems from energy dissipation through the zipping and unzipping of carbon nanotubes at contacts. http://www.sciencemag.org/content/330/6009/1364 [ Last edited by csuhcb2000 on 2010-12-7 at 21:18 ] |

|
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 322求調(diào)劑 +8 | 宋明欣 2026-03-27 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 287求調(diào)劑 +11 | land xuxu 2026-03-26 | 11/550 |
|
|
[考研] 一志愿鄭大材料工程290求調(diào)劑 +4 | Youth_ 2026-03-30 | 4/200 |
|
|
[考研] 300求調(diào)劑,材料科學英一數(shù)二 +16 | leaflight 2026-03-24 | 16/800 |
|
|
[考研] 0703本科鄭州大學求調(diào)劑 +7 | nhj_ 2026-03-25 | 7/350 |
|
|
[考研] 311求調(diào)劑 +10 | lin0039 2026-03-26 | 10/500 |
|
|
[考研] 求調(diào)劑 +10 | 張zz111 2026-03-27 | 11/550 |
|
|
[考研] 290求調(diào)劑 +3 | dfffsar 2026-03-29 | 3/150 |
|
|
[考研] 求調(diào)劑,一志愿 南京航空航天大學 ,080500材料科學與工程學碩,總分289分 +7 | @taotao 2026-03-29 | 7/350 |
|
|
[考研] 材料學碩333求調(diào)劑 +11 | 北道巷 2026-03-24 | 11/550 |
|
|
[考研] 0856求調(diào)劑 +13 | zhn03 2026-03-25 | 14/700 |
|
|
[考研] 295求調(diào)劑 +5 | 1428151015 2026-03-27 | 6/300 |
|
|
[考研] 086000調(diào)劑 +3 | 7901117076 2026-03-26 | 3/150 |
|
|
[考研] 一志愿鄭大085600,310分求調(diào)劑 +5 | 李瀟可 2026-03-26 | 5/250 |
|
|
[考研] 求調(diào)劑 一志愿 本科 北科大 化學 343 +6 | 13831862839 2026-03-24 | 7/350 |
|
|
[考研] 321求調(diào)劑 +6 | Ymlll 2026-03-24 | 6/300 |
|
|
[考研] 327求調(diào)劑 +7 | prayer13 2026-03-23 | 7/350 |
|
|
[考研] 網(wǎng)絡空間安全0839招調(diào)劑 +4 | w320357296 2026-03-25 | 6/300 |
|
|
[考研] 302求調(diào)劑 +4 | 錦衣衛(wèi)藤椒 2026-03-25 | 4/200 |
|
|
[考研] 生物學學碩求調(diào)劑 +7 | 小羊睡著了? 2026-03-23 | 10/500 |
|