Magic high-pressure strengthening in tungsten carbide system

被引：31

作者：

Zhang, Yuanfen ^{[1
]}

Kou, Zili ^{[1
]}

Wang, Zhiwei ^{[1
]}

Yang, Ming ^{[1
]}

Lu, Jingrui ^{[1
]}

Liang, Hao ^{[1
]}

Guan, Shixue ^{[1
]}

Hu, Qiwei ^{[1
]}

Gong, Hongxia ^{[1
]}

He, Duanwei ^{[1
]}

机构：

[1] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Sichuan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 07期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Tungsten carbide; High-pressure strengthening; Plastic deformation; Microdefects; Mechanical properties; FRACTURE-TOUGHNESS; WC; BEHAVIOR; DIAMOND; HARDNESS; NITRIDE;

D O I：

10.1016/j.ceramint.2019.01.195

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High-pressure strengthening is reported to be an effective approach to strengthen materials in addition to traditional nanocrystalline strengthening. Numerous studies have proven that high pressure is an important factor for improving the mechanical properties of materials. Here, we sintered high-purity sub-micron tungsten carbide (sm-WC) ceramics without any additives under a high pressure of 10 GPa and temperatures ranging from 1000 degrees C to 1500 degrees C. Numerous microdefects (stacking faults and twins) were introduced inside the grains, and the Vickers hardness of the well-sintered WC bulks reached a high value of 33 GPa, which could be compared with that of single crystal and nanocrystalline counterparts. Thus, the high-pressure strengthening can be applied to the WC system and improves the mechanical properties. The strengthening mechanism is that the high pressure can make the grains take place bulk yield, promote a severe plastic deformation, and introduce numerous micro-defects. These defects act as obstacles against dislocations glide during deformation, and thus improve the mechanical properties.

引用

页码：8721 / 8726

页数：6

共 53 条

[1]

[Anonymous], P PHYS SOC

[2] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].

ANSTIS, GR ;

CHANTIKUL, P ;

LAWN, BR ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538

[3] The importance of amorphous intergranular films in self-reinforced Si3N4 ceramics [J].

Becher, PF ;

Painter, GS ;

Sun, EY ;

Hsueh, CH ;

Lance, MJ .

ACTA MATERIALIA, 2000, 48 (18-19) :4493-4499

[4]

BROOKES CA, 1983, PHILOS MAG A, V47, pL9, DOI 10.1080/01418618308245250

[5] Microstructures of binderless tungsten carbides sintered by spark plasma sintering process [J].

Cha, SI ;

Hong, SH .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 356 (1-2) :381-389

[6] Spark plasma sintering of tungsten carbide nanopowders obtained through DC arc plasma synthesis [J].

Chuvil'deev, V. N. ;

Blagoveshchenskiy, Yu. V. ;

Nokhrin, A. V. ;

Boldin, M. S. ;

Sakharov, N. V. ;

Isaeva, N. V. ;

Shotin, S. V. ;

Belkin, O. A. ;

Popov, A. A. ;

Smirnova, E. S. ;

Lantsev, E. A. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 708 :547-561

[7] Orientation-dependent hardness and nanoindentation-induced deformation mechanisms of WC crystals [J].

Csanadi, Tamas ;

Bl'anda, Marek ;

Chinh, Nguyen Q. ;

Hvizdos, Pavol ;

Dusza, Jan .

ACTA MATERIALIA, 2015, 83 :397-407

[8] FRACTURE TOUGHNESS DETERMINATIONS BY INDENTATION [J].

EVANS, AG ;

CHARLES, EA .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1976, 59 (7-8) :371-372

[9] SPS, binderless WC powders, and the problem of sub carbide [J].

Girardini, Luca ;

Zadra, Mario ;

Casari, Francesco ;

Molinari, Alberto .

Metal Powder Report, 2008, 63 (04) :18-22

[10]

Grasso S., 2010, J AM CERAM SOC, V92, P2418

← 1 2 3 4 5 6 →