Improved mechanical properties and toughening mechanism of mullite ceramics reinforced by introducing Ti 3 AlC 2 particles

2021 ◽  
Author(s):  
Fuzhou Mao ◽  
Weiqiang Pi ◽  
Yuqi Li ◽  
Xu Xu ◽  
Ping Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Toughening Mechanism ◽  
Mullite Ceramics

Phase formation, microstructure development, and mechanical properties of kaolin‐based mullite ceramics added with Fe 2 O 3

2021 ◽  
Author(s):  
Zhenying Liu ◽  
Wei Lian ◽  
Yin Liu ◽  
Jinbo Zhu ◽  
Changguo Xue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Formation ◽  
Microstructure Development ◽  
Mullite Ceramics

Shaping quality, microstructure, and mechanical properties of melt-grown mullite ceramics by directed laser deposition

2021 ◽  
Vol 871 ◽  
pp. 159609
Author(s):  
Dongjiang Wu ◽  
Dake Zhao ◽  
Yunfei Huang ◽  
Fangyong Niu ◽  
Guangyi Ma
Keyword(s):  
Mechanical Properties ◽  
Laser Deposition ◽  
Microstructure And Mechanical Properties ◽  
Mullite Ceramics

Mechanical properties and toughening mechanisms of epoxy/graphene nanocomposites

2015 ◽  
Vol 35 (3) ◽  
pp. 257-266 ◽  
Author(s):  
Rahim Eqra ◽  
Kamal Janghorban ◽  
Habib Daneshmanesh
Keyword(s):  
Mechanical Properties ◽  
Fracture Surface ◽  
Flexural Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Graphene Nanosheets ◽  
Flexural Modulus ◽  
Mechanical Tests ◽  
Toughening Mechanism ◽  
Graphene Nanocomposites

Abstract Because of extraordinary physical, chemical and mechanical properties, graphene nanosheets (GNS) are suitable fillers for optimizing the properties of different polymers. In this research, the effect of GNS content (up to 1 wt.%) on tensile and flexural properties, morphology of fracture surface, and toughening mechanism of epoxy were investigated. Results of mechanical tests showed a peak for tensile and flexural strength of samples with 0.1 wt.% GNS such that the tensile and flexural strength improved by 13% and 3.3%, respectively. The Young’s modulus and flexural modulus increased linearly with GNS content, although the behavior of the Young’s modulus was more remarkable. Morphological investigations confirmed this behavior because the GNS dispersion in the epoxy matrix was uniform at lower contents and agglomerated at higher contents. Finally, microscopical observation showed that the major toughening mechanism of graphene-epoxy nanocomposites was crack path deflection, which changed the mirror fracture surface of the pure epoxy to rough surface.

Microstructure Simulation and Toughening Mechanism of Ceramic Tool Material

2011 ◽  
Vol 335-336 ◽  
pp. 688-694
Author(s):  
Xiao Hui Zhu ◽  
Chuan Zhen Huang ◽  
Han Lian Liu ◽  
Bin Zou ◽  
Hong Tao Zhu
Keyword(s):  
Mechanical Properties ◽  
Single Phase ◽  
Three Dimensional ◽  
Tool Material ◽  
Ceramic Tool ◽  
Toughening Mechanism ◽  
C Language ◽  
Finite Element Software ◽  
Microstructure Simulation ◽  
Ceramic Tool Material

Based on the microstructure results of Monte Carlo simulation, a three-dimensional grid model is built up, and imported into the finite element software with C++ language to analyze the mechanical properties of ceramic tool material. The stress field and residual stress of single-phase and multiphase ceramics have been analyzed by the computer simulation technology.

Effect of Al content on the mechanical properties and toughening mechanism of Zr-Co-Al alloys prepared by rapid solidification

2021 ◽  
pp. 142237
Author(s):  
X. Li ◽  
W.F. Lu ◽  
C.J. Li ◽  
Q. Yuan ◽  
Z.X. Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rapid Solidification ◽  
Al Alloys ◽  
Toughening Mechanism ◽  
Al Content

Thermo-mechanical properties of mullite ceramics: New data

2018 ◽  
Vol 102 (1) ◽  
pp. 416-426 ◽  
Author(s):  
Thomas F. Krenzel ◽  
Jürgen Schreuer ◽  
Derek Laubner ◽  
Michel Cichocki ◽  
Hartmut Schneider
Keyword(s):  
Mechanical Properties ◽  
Mullite Ceramics

Study of the mechanical properties and toughening mechanism of ZrO2 particles toughened Si3N4 ceramics

2020 ◽  
Vol 10 (6) ◽  
pp. 928-933
Author(s):  
Liang Tian ◽  
Qinglin Hou ◽  
Yingxia Wang ◽  
Yihui Hou
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Sintering Temperature ◽  
High Hardness ◽  
Fracture Morphology ◽  
Xrd Analysis ◽  
High Thermal Stability ◽  
Toughening Mechanism ◽  
Temperature Resistance ◽  
Si3n4 Ceramics

Si3N4 ceramic has excellent properties such as high temperature resistance, high hardness, and high thermal stability, but it has the disadvantages of high hardness and brittleness and difficulty in later processing. In this paper, ZrO2 was used as toughening phase, and ZrO2 toughened Si3N4 ceramics was prepared by injection molding. The effects of ZrO2 sintering temperature and content on the mechanical properties and fracture morphology were studied. Experiments show that when the ZrO2 content is 10 wt.% and the sintering temperature reaches 1650 °C, the bending strength and fracture toughness of Si3N4 ceramics reach the maximum at the same time, which are 767 MPa and 8.7 MPa·m1/2, respectively. The density is high. XRD analysis revealed that if the sintering temperature is too high, the ZrO2/Si3N4 system will generate a large number of ZrN impurity phases that cannot be phase-transformed, which ultimately affects the ceramic properties. According to fracture morphology, the toughening mechanism of ZrO2 is stress-induced phase transition.

Study of the Mechanical Properties and Toughening Mechanism of Nano-NbC Particles Toughened Si3N4-Based Ceramics

2020 ◽  
Vol 20 (3) ◽  
pp. 1709-1714
Author(s):  
Liang Tian ◽  
Qinglin Hou ◽  
Yingxia Wang ◽  
Yihui Hou ◽  
Li Li
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Injection Moulding ◽  
Sintering Temperature ◽  
Toughening Mechanism ◽  
Comprehensive Properties ◽  
Backscattered Electron ◽  
Grain Distribution ◽  
Electron Imaging

In this article, nano-NbC particles toughened Si3N4-based ceramics were prepared by injection moulding and their mechanical properties along with toughening mechanism were studied. An increase of nano-NbC content, gradually homogenizes microstructure of the Si3N4-based ceramics along with increase in its density. However, the fracture toughness and flexural strength first increases and then decreases. The Si3N4-based ceramics demonstrate good comprehensive properties at the 15 wt% nano-NbC content and sintering temperature of 1550 °C (where the density is 85.3%, the flexural strength is 845 MPa, and the fracture toughness is 9.3 MPa·m1/2), Backscattered electron imaging shows that nano-NbC particles can be well dispersed in the Si3N4 ceramic matrix by injection moulding and ceramics are toughened by crack deflection and microcracking effects. It was also found that increasing sintering temperature makes the β-Si3N4 grain distribution more uniform by reducing the porosity.

Porous mullite ceramics with enhanced mechanical properties prepared by SLS using MnO2 and phenolic resin coated double-shell powders

2019 ◽  
Vol 45 (17) ◽  
pp. 21136-21143 ◽  
Author(s):  
An-Nan Chen ◽  
Jing-Yan Chen ◽  
Jia-Min Wu ◽  
Li-Jin Cheng ◽  
Rong-Zhen Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phenolic Resin ◽  
Porous Mullite ◽  
Mullite Ceramics
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