Effect of collinear flaws on flexural strength and fracture behavior of ZrB2-SiC ceramic
Effect of collinear flaws on flexural strength and fracture behavior of ZrB2-SiC ceramic
复制标题
共线缺陷对ZrB2-SiC陶瓷抗弯强度和断裂行为的影响
DOI：
10.1016/j.ceramint.2017.07.038
复制
发表时间：
2017-11
影响因子：
5.2
通讯作者：
Luo Xiaoguang
中科院分区：
文献类型：
--
作者：
Wang Anzhe;Hu Ping;Du Bin;Zhang Xinghong;Han Jiecai;Luo Xiaoguang
共线缺陷作为一种典型的多重缺陷，对陶瓷材料的力学性能尤为不利。利用飞秒激光在ZrB 2 - 20vol%SiC（ZS）陶瓷中成功制备了两条长度和间距可控的微米级共线裂纹，研究了裂纹长度和间距对ZrB 2 - 20vol%SiC（ZS）陶瓷抗弯强度和断裂行为的影响（即，载荷-位移曲线和断口形貌。当裂纹间距小于临界值时，抗弯强度基本保持不变，并强烈依赖于裂纹长度，然后随着裂纹间距的增加而逐渐增加，并达到一个平台。当裂纹间距与裂纹长度之比足够小时，由于裂纹间的相互作用较强，裂纹在断裂前会先聚并。如果该比值过大，则断裂面中镜面区域的中心会偏移。
As a typical kind of multiple flaws, collinear flaws are particularly detrimental to the mechanical properties of ceramics. Here, two identical collinear micron-sized flaws with controllable length and spacing were successfully fabricated in ZrB2-20 vol% SiC (ZS) ceramic using femtosecond laser, and the effect of flaw length and spacing on flexural strength as well as fracture behavior (i.e., load-displacement curve and fractography) of ZS ceramic were investigated. The flexural strength almost remained constant when the flaw spacing was less than the critical value, which strongly depended on the flaw length, then increased gradually with increasing flaw spacing and reached a plateau. If the ratio between flaw spacing and flaw length was small enough, flaws would tend to coalescence first before fracture, owing to the strong interaction between flaws. If the ratio was too large, the center of the mirror area in fracture surface would be offset.
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DOI：
10.1007/978-94-017-2260-5
发表时间：
1973
期刊：
--
影响因子：
--
作者：
G. Sih
通讯作者：
G. Sih
影响因子：
2.5
作者：
N. Noda;K. Oda
通讯作者：
N. Noda;K. Oda
DOI：
10.4028/www.scientific.net/kem.223.1
发表时间：
2002-02
期刊：
Key Engineering Materials
影响因子：
--
作者：
R. Danzer
通讯作者：
R. Danzer
影响因子：
5.2
作者：
Pecanac, G.;Malzbender, J.;Singheiser, L.
通讯作者：
Singheiser, L.
影响因子：
6
作者：
T. Swift
通讯作者：
T. Swift