Ultralight, Strong, Three-Dimensional SiC Structures

被引：111

作者：

Chabi, Sakineh ^{[1
]}

Rocha, Victoria G. ^{[2
]}

Garcia-Tunon, Esther ^{[2
]}

Ferraro, Claudio ^{[2
]}

Saiz, Eduardo ^{[2
]}

Xia, Yongde ^{[1
]}

Zhu, Yanqiu ^{[1
]}

机构：

[1] Univ Exeter, Coll Engn Math & Phys Sci, Exeter EX4 4QF, Devon, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Adv Struct Ceram, Dept Mat, London SW7 2AZ, England

来源：

ACS NANO | 2016年 / 10卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

silicon carbide; three-dimensional; 2D SiC; ultralight; recoverable ceramic; MONOLITHIC SILICA AEROGEL; TO-PASSIVE TRANSITION; THERMAL-CONDUCTIVITY; CERAMIC NANOLATTICES; CARBIDE; FOAM; MICROSTRUCTURE; FABRICATION; OXIDATION; GRAPHITE;

D O I：

10.1021/acsnano.5b05533

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultralight and strong three-dimensional (3D) silicon carbide (SiC) structures have been generated by the carbothermal reduction of SiO with a graphene foam (GF). The resulting SiC foams have an average height of 2 mm and density ranging between 9 and 17 mg cm(-3). They are the lightest reported SiC structures. They consist of hollow struts made from ultrathin SiC flakes and long 1D SiC nanowires growing from the trusses, edges, and defect sites between layers. AFM results revealed an average flake thickness of 2-3 nm and lateral size of 2 mu m. In-situ compression tests in the scanning electron microscope (SEM) show that, compared with most of the existing lightweight foams, the present 3D SiC exhibited superior compression strengths and significant recovery after compression strains of about 70%.

引用

页码：1871 / 1876

页数：6

共 25 条

[1] Determination of the active-to-passive transition in the oxidation of silicon carbide in standard and microwave-excited air [J].

Balat, MJH .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1996, 16 (01) :55-62

[2] Super-compressible foamlike carbon nanotube films [J].

Cao, AY ;

Dickrell, PL ;

Sawyer, WG ;

Ghasemi-Nejhad, MN ;

Ajayan, PM .

SCIENCE, 2005, 310 (5752) :1307-1310

[3] Three dimensional (3D) flexible graphene foam/polypyrrole composite: towards highly efficient supercapacitors [J].

Chabi, Sakineh ;

Peng, Chuang ;

Yang, Zhuxian ;

Xia, Yongde ;

Zhu, Yanqiu .

RSC ADVANCES, 2015, 5 (06) :3999-4008

[4] Versatile Fabrication of Ultralight Magnetic Foams and Application for Oil-Water Separation [J].

Chen, Ning ;

Pan, Qinmin .

ACS NANO, 2013, 7 (08) :6875-6883

[5] Conventional and novel processing methods for cellular ceramics [J].

Colombo, P .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2006, 364 (1838) :109-124

[6] Optical studies of undoped and doped wide bandgap carbide and nitride semiconductors [J].

Freitas, JA ;

Moore, WJ .

BRAZILIAN JOURNAL OF PHYSICS, 1998, 28 (01) :12-18

[7] OPTIMIZATION OF MONOLITHIC SILICA AEROGEL INSULANTS [J].

FRICKE, J ;

LU, X ;

WANG, P ;

BUTTNER, D ;

HEINEMANN, U .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1992, 35 (09) :2305-2309

[8] Synthesis of β-silicon carbide nanofiber from an exfoliated graphite and amorphous silica [J].

Hwang, Hae Jin ;

Lee, Kyoung-Jin ;

An, Yong-Tae ;

Choi, Byung-Hyun ;

Seo, Won-Seon .

MATERIALS CHEMISTRY AND PHYSICS, 2012, 134 (01) :13-15

[9] Synthesis of silicon carbide whiskers using reactive graphite as template [J].

Li, Yawei ;

Wang, Qinghu ;

Fan, Haibing ;

Sang, Shaobai ;

Li, Yuanbing ;

Zhao, Lei .

CERAMICS INTERNATIONAL, 2014, 40 (01) :1481-1488

[10] Gas pressure and temperature dependences of thermal conductivity of porous ceramic materials .2. Refractories and ceramics with porosity exceeding 30% [J].

Litovsky, E ;

Shapiro, M ;

Shavit, A .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (05) :1366-1376

← 1 2 3 →