金属陶瓷颗粒尺寸与WC含量对双结构Ti(C,N)基金属陶瓷组织和性能的影响（英文）
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摘要
研究了原始金属陶瓷颗粒尺寸和WC添加量对双结构Ti(C,N)基金属陶瓷组织和性能的影响。结果表明,Ti(C,N)基金属陶瓷颗粒在基体中均匀分布。随着WC含量的增加,基体上的白芯/灰壳和无芯组织逐渐增多。此外,还发现了一种具有四层复合结构的新相。随着颗粒尺寸的增加,断裂韧性增加,而抗弯强度和硬度呈相反的趋势。随着WC含量的增加,断裂韧性和断裂强度增加,硬度降低。双结构Ti(C,N)基金属陶瓷的主要韧化机理是裂纹分叉、桥接、偏转以及主裂纹尖端附近微裂纹的形成和颗粒的拔出效应。
The effect of starting granule size and addition of WC on the microstructure and mechanical properties of double structure Ti(C,N) based cermets was investigated. Results show that the Ti(C, N) based cermet granules are homogeneously distributed in the matrix. By increasing the WC content, the amount of hard phases with a white core/grey rim and a coreless structure in the matrix increases. A new phase with a four-layer composite structure is found. With the increase of the granules size, the fracture toughness increases, while the transverse rupture strength(TRS) and hardness show an opposite trend. With the increase of WC content, the fracture toughness and TRS increases, while the hardness decreases. The higher fracture toughness of the double structure Ti(C, N) based cermets is mainly owing to the branching, bridging and deflection of the crack, the formation of micro-cracks near the tip of the main crack, and the pull-out effect of granules.
The effect of starting granule size and addition of WC on the microstructure and mechanical properties of double structure Ti(C,N) based cermets was investigated. Results show that the Ti(C, N) based cermet granules are homogeneously distributed in the matrix. By increasing the WC content, the amount of hard phases with a white core/grey rim and a coreless structure in the matrix increases. A new phase with a four-layer composite structure is found. With the increase of the granules size, the fracture toughness increases, while the transverse rupture strength(TRS) and hardness show an opposite trend. With the increase of WC content, the fracture toughness and TRS increases, while the hardness decreases. The higher fracture toughness of the double structure Ti(C, N) based cermets is mainly owing to the branching, bridging and deflection of the crack, the formation of micro-cracks near the tip of the main crack, and the pull-out effect of granules.
引文
1 Liu Ning.Ti(C,N)-based Cermets Materials(Ti(C,N)[M].Hefei:Hefei University of Technology Press,2009:12(in Chinese)
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23 Anthony S R,Chubb J P,Congleton J.Phil Mag[J],1970,22:1201
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26 Ma J,Wang H,Weng L et al.J Eur Ceram Soc[J],2004,24:825
27 Todd R I,Derby B.Acta Mater[J],2004,52:1621
28 Choe H,Chen D,Schneibel J H et al.Intermetallic[J],2001,9:319
2 Ettmayer P,Kolaska H,Lengauer W et al.Int J Refract Met Hard Mater[J],1995,13:343
3 Clark E B,Roebuck B.Int J Refract Met Hard Mater[J],1992,11:23
4 Monteverde F,Medri V,Bellosi A.J Eur Ceram Soc[J],2002,22:2587
5 Wu P,Zheng Y,Zhao Y et al.Mater Des[J],2011,32:951
6 Li Y,Liu N,Li Y.Mater Sci Tech[J],2011,27:1287
7 Liu N,Yin W H,Zhu L W.Mater Sci Eng A[J],2007,445-446:707
8 Chao S,Liu N,Yuan Y P et al.Ceram Int[J],2005,31:851
9 You X Q,Si T Z,Liu N et al.Ceram Int[J],2005,31:33
10 Fang Z,Lockwood G,Griffo A.Metall Trans A[J],1999,30:3231
11 Deng X,Patterson B R,Chawla K K et al.Int J Refract Met Hard Mater[J],2001,19:547
12 Deng X,Patterson B R,Chawla K K et al.J Mater Sci Lett[J],2002,21:707
13 Liu N,Xu Y D,Li Z H et al.Ceram Int[J],2003,29:919
14 Shetty D K,Wright I G,Minces P N et al.J Mater Sci[J],1985,20:1873
15 Zhang X,Liu N,Rong C L.Mater Char[J],2008,59:1690
16 Liu Y,Jin Y Z,Yu H J.Int J Refract Met Hard Mater[J],2011,29:104
17 Liu N,Chao S,Huang X M.J Eur Ceram Soc[J],2006,26:3861
18 Chen Xinjie,Liu Ning,Liu Aijun et al.Cemented Carbide[J],2013,30:173(in Chinese)
19 Li Y,Liu N,Zhang X B et al.Int J Refract Met Hard Mater[J],2008,26:33
20 Rosenfield A R,Majumdar B S.Metall Trans A[J],1987,18:1053
21 Hausild P,Nedba I,Berdin C.Mater Sci Eng A[J],2002,335:164
22 Perelmuter M.J Eur Ceram Soc[J],2014,34:2789
23 Anthony S R,Chubb J P,Congleton J.Phil Mag[J],1970,22:1201
24 Evans A G,Faber K T.J Am Ceram Soc[J],1984,67:255
25 Leguillona D,Tariolleb S,Martinc E et al.J Eur Ceram Soc[J],2006,26:343
26 Ma J,Wang H,Weng L et al.J Eur Ceram Soc[J],2004,24:825
27 Todd R I,Derby B.Acta Mater[J],2004,52:1621
28 Choe H,Chen D,Schneibel J H et al.Intermetallic[J],2001,9:319