Institutional Repository of Coll Mat Sci & Engn
Toughening Effect of ZrB_2 in Al_2O_3-ZrB_2 Nanocomposite Ceramics | |
Wang Xiaomin1; La Peiqing1; Wang Bingjun2; Yang Guolai1 | |
2016 | |
发表期刊 | 稀有金属材料与工程 |
ISSN | 1002-185X |
卷号 | 45期号:7页码:1714-1718 |
摘要 | The Al_2O_3-ZrB_2 nanocomposite ceramics were prepared and the mechanical properties of the process parameters effect were studied. The results show that for various applied sintering temperatures of Al_2O_3 ceramics, a maximum Vickers hardness of 18 970 MPa and high reliability are attained at 1500 °C and at atmosphere sintering. The fracture toughness is (5.20.3) MPa·m~(1/2). In addition, the sample is not well densified at the sintering temperature. Scanning electron microscopy (SEM) shows that fine ZrB_2 particles disperse and are pinned at grain boundaries to inhibit grain boundary movement effectively. While larger ZrB_2 particles distribute between A1_2O_3 particles uniformly and occupy Al_2O_3 particles growing space to hinder the matrix grains, which greatly promote the densification of the ceramic and improve the microstructure. 20% ZrB_2/Al_2O_3 composite ceramics exhibit a relative density above 98% at (450 °C, Vickers hardness of 18 070 MPa, and fracture toughness of (6.70.2) MPa·m~(1/2) Fracture morphology indicates that trans-granular fracture occurs in the nanocomposite ceramic with high toughness. |
关键词 | atmospheric sintering nano alumina ceramic nanocomposite ceramics toughening |
收录类别 | CSCD |
语种 | 英语 |
WOS研究方向 | Engineering |
WOS类目 | ENGINEERING CHEMICAL |
CSCD记录号 | CSCD:5758148 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/71743 |
专题 | 材料科学与工程学院 兰石研究院(新区研究院) |
作者单位 | 1.Lanzhou University of Technology, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou, Gansu 730050, China 2.Qinghai University, Xining, Qinghai 810016, China |
第一作者单位 | 兰州理工大学 |
第一作者的第一单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Wang Xiaomin,La Peiqing,Wang Bingjun,et al. Toughening Effect of ZrB_2 in Al_2O_3-ZrB_2 Nanocomposite Ceramics[J]. 稀有金属材料与工程,2016,45(7):1714-1718. |
APA | Wang Xiaomin,La Peiqing,Wang Bingjun,&Yang Guolai.(2016).Toughening Effect of ZrB_2 in Al_2O_3-ZrB_2 Nanocomposite Ceramics.稀有金属材料与工程,45(7),1714-1718. |
MLA | Wang Xiaomin,et al."Toughening Effect of ZrB_2 in Al_2O_3-ZrB_2 Nanocomposite Ceramics".稀有金属材料与工程 45.7(2016):1714-1718. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论