Nano-diamond reinforced ZrB2-SiC composites

被引:66
作者
Fattahi, Mehdi [1 ]
Azizian-Kalandaragh, Yashar [2 ,3 ]
Delbari, Seyed Ali [4 ]
Namini, Abbas Sabahi [3 ,5 ]
Ahmadi, Zohre [4 ]
Asl, Mehdi Shahedi [4 ]
机构
[1] Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam
[2] Univ Mohaghegh Ardabili, Dept Phys, POB 179, Ardebil, Iran
[3] Sabalan Univ Adv Technol, Fac Adv Technol, Dept Engn Sci, Namin, Iran
[4] Univ Mohaghegh Ardabili, Dept Mech Engn, Ardebil, Iran
[5] Univ Mohaghegh Ardabili, Fac Adv Technol, Dept Engn Sci, Namin, Iran
关键词
ZrB2; SiC; Nano-diamond; SPS; HOT-PRESSING PARAMETERS; MECHANICAL-PROPERTIES; HEAT-TRANSFER; FRACTOGRAPHICAL CHARACTERIZATION; THERMAL-STRESS; PLASMA; CERAMICS; DENSIFICATION; TEMPERATURE; ZIRCONIUM;
D O I
10.1016/j.ceramint.2020.01.008
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
The effect of adding various amounts of nano-diamond additive (0, 1, 2, and 3 wt%) on the densification behavior and mechanical properties of ZrB2-25 vol% SiC samples were investigated in this research. All samples were spark plasma sintered at 1900 degrees C under 40 MPa external pressure for 7 min. Relative density (RD) values higher than 99.9% were obtained for the samples with 0, 1, and 2 wt% nano-diamond, while adding 3 wt% diamond dropped the RD by similar to 1.2%. The XRD and microstructural evaluations revealed the formation of some in-situ phases, namely ZrC and B4C. The highest Vickers hardness (24.7 GPa) and fracture toughness (5.8 MPa m(1/2)) were achieved for the samples doped with 2 and 3 wt% nano-diamond, respectively. Ultimately, the SEM micrographs indicated the role of different toughening mechanisms on obtaining such a high value of fracture toughness.
引用
收藏
页码:10172 / 10179
页数:8
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