Mechanical properties of HfB2 whiskers

被引：0

作者：

S. N. Dub

P. I. Loboda

Yu. I. Bogomol

G. N. Tolmacheva

V. N. Tkach

机构：

[1] National Academy of Sciences of Ukraine,Bakul Institute for Superhard Materials

[2] KPI National Technical University of Ukraine,NNC Kharkovskii Physicotechnical Institute

[3] National Academy of Sciences of Ukraine,undefined

来源：

Journal of Superhard Materials | 2013年 / 35卷

关键词：

LaB; -HfB; eutectic ceramic composites; HfB; whiskers; nanoindentation; nucleation of dislocation; theoretical shear strength;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Nanoindentation has been used to study mechanical behavior of HfB2 whiskers 10–20μm in diameter in a directionally reinforced ceramics. For comparison a bulk (0001) HfB2 single crystal 5 mm in diameter has been tested. For both the samples a pop-in due to the nucleation of dislocations in a previously dislocation-free region under the indent has been observed. It has been shown that for a HfB2 whisker in reinforced ceramics the critical load of the elastoplastic transition is twice as high as for a bulk HfB2 single crystal and, the maximum shear stress, at which the nucleation of the first dislocation loop in a HfB2 whisker occurs, approaches to the theoretical shear strength value. The observed effect has been caused by the higher structural perfection of whiskers as compared with a bulk sample. Hardness and elastic modulus of the HfB2 whisker are higher than that of the bulk crystal by 10 and 3%, respectively.

引用

页码：234 / 241

页数：7

共 50 条

[11] HfB2 and Hf-B-N hard coatings by chemical vapor deposition [J].

Jayaraman, S. ;

Gerbi, J. E. ;

Yang, Y. ;

Kim, D. Y. ;

Chatterjee, A. ;

Bellon, P. ;

Girolami, G. S. ;

Chevalier, J. P. ;

Abelson, J. R. .

SURFACE & COATINGS TECHNOLOGY, 2006, 200 (22-23) :6629-6633

[12] Nanoscratch study of hard HfB2 thin films using experimental and finite element techniques [J].

Chatterjee, Abhishek ;

Polycarpou, Andreas A. ;

Abelson, John R. ;

Bellon, Pascal .

WEAR, 2010, 268 (5-6) :677-685

[13] Impact of a Subsonic Dissociated Air Flow on the Surface of HfB2–30 vol % SiC UHTC Produced by the Sol–Gel Method [J].

E. P. Simonenko ;

N. P. Simonenko ;

A. N. Gordeev ;

A. F. Kolesnikov ;

V. G. Sevastyanov ;

N. T. Kuznetsov .

Russian Journal of Inorganic Chemistry, 2018, 63 :1345-1355

[14] Modification of HfB2–30% SiC UHTC with Graphene (1 vol %) and Its Influence on the Behavior in a Supersonic Air Jet [J].

E. P. Simonenko ;

N. P. Simonenko ;

A. F. Kolesnikov ;

A. V. Chaplygin ;

A. S. Lysenkov ;

I. A. Nagornov ;

V. G. Sevastyanov ;

N. T. Kuznetsov .

Russian Journal of Inorganic Chemistry, 2021, 66 :1405-1415

[15] Mechanical properties of HfB2.7 nanocrystalline thin films [J].

S. N. Dub ;

A. A. Goncharov ;

S. S. Ponomarev ;

V. B. Filippov ;

G. N. Tolmacheva ;

A. V. Agulov .

Journal of Superhard Materials, 2011, 33 :151-158

[16] Mechanical properties of HfB2.7 nanocrystalline thin films [J].

Dub, S. N. ;

Goncharov, A. A. ;

Ponomarev, S. S. ;

Filippov, V. B. ;

Tolmacheva, G. N. ;

Agulov, A. V. .

JOURNAL OF SUPERHARD MATERIALS, 2011, 33 (03) :151-158

[17] Production and Oxidation Resistance of HfB2–30 vol % SiC Composite Powders Modified with Y3Al5O12 [J].

E. P. Simonenko ;

N. P. Simonenko ;

I. A. Nagornov ;

V. G. Sevastyanov ;

N. T. Kuznetsov .

Russian Journal of Inorganic Chemistry, 2020, 65 :1416-1423

[18] Processing and mechanical properties of hydroxyapatite reinforced with hydroxyapatite whiskers [J].

Suchanek, W ;

Yashima, M ;

Kakihana, M ;

Yoshimura, M .

BIOMATERIALS, 1996, 17 (17) :1715-1723

[19] Behavior of Ultra-High Temperature Ceramic Material HfB2–SiC–Y3Al5O12 under the Influence of Supersonic Dissociated Air Flow [J].

E. P. Simonenko ;

N. P. Simonenko ;

A. N. Gordeev ;

A. F. Kolesnikov ;

A. S. Lysenkov ;

I. A. Nagornov ;

V. N. Kurlov ;

A. E. Ershov ;

V. G. Sevast’yanov ;

N. T. Kuznetsov .

Russian Journal of Inorganic Chemistry, 2020, 65 :1596-1605

[20] Mechanical properties of polyvinyl chloride composites reinforced with magnesium borate whiskers [J].

Li, Lie ;

Nai, Xueying ;

Qian, Guimin ;

Zhu, Donghai ;

Li, Wu .

ADVANCES IN TEXTILE ENGINEERING AND MATERIALS III, PTS 1 AND 2, 2013, 821-822 :1143-1147

← 1 2 3 4 5 →