Three-Dimensional Simulation of Nano-Composite Ceramic Tool Materials

2014 ◽  
Vol 1052 ◽  
pp. 86-90
Author(s):  
Song Hao ◽  
Chuan Zhen Huang
Keyword(s):  
Microstructure Evolution ◽  
Boundary Migration ◽  
Three Dimensional ◽  
Phase Field Model ◽  
Tool Material ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Three Phase ◽  
Dimensional Simulation

A phase field model of three-phase composite ceramic tool materials with two kinds of nanoparticles is set up in this research. The three-dimensional simulation algorithm is modified and a new efficient algorithm is established. The microstructure evolution of three-phase nanoceramic tool materials is more efficiently and successfully simulated in 200x200x200 unit size. Microstructure evolution of single-phase and three-phase ceramic tool materials is simulated respectively. It can be found that the peak value of grain size distribution for three-phase nanoceramic tool material is smaller than average diameter. It indicates that the nanoparticles not only restrain grain boundary migration, but also prevent the elimination of small grains and refine matrix grains.

Three Dimensional Monte Carlo Simulation of Microstructure Evolution in Presence of Pores for Three-Phase Nano-Composite Ceramic Tool Materials

2012 ◽  
Vol 457-458 ◽  
pp. 1567-1572
Author(s):  
Song Hao ◽  
Chuan Zhen Huang ◽  
Bin Zou ◽  
Jun Wang ◽  
Han Lian Liu ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Grain Growth ◽  
Microstructure Evolution ◽  
Three Dimensional ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Free System ◽  
Tool Materials ◽  
Three Phase

A new three-dimensional Monte Carlo (MC) model in presence of pores of microstructure evolution for three-phase nano-composite ceramic tool materials is successfully established to simulate the grain growth during sintering process in this paper. The defect-free microstructure evolution and microstructure evolution in presence of pore are simulated and investigated. The results show that the new MC model can well simulate the grain growth and pores shrinkage during densification process. Compared with defect-free system, the grain growth velocity can be slow down obviously owning to the existence of pores.

Three dimensional simulation of microstructure evolution for ceramic tool materials

2011 ◽  
Vol 50 (12) ◽  
pp. 3334-3341 ◽  
Author(s):  
Song Hao ◽  
Chuanzhen Huang ◽  
Bin Zou ◽  
Jun Wang ◽  
Hanlian Liu ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Three Dimensional ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Dimensional Simulation

Three Dimensional Monte Carlo Simulation of Microstructure Evolution in Presence of Pores and Impurities for Three-Phase Nanocomposite Ceramic Tool Materials

2012 ◽  
Vol 500 ◽  
pp. 531-536
Author(s):  
Song Hao ◽  
Chuan Zhen Huang ◽  
Bin Zou ◽  
Jun Wang ◽  
Han Lian Liu ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Microstructure Evolution ◽  
Three Dimensional ◽  
Ceramic Tool ◽  
Quantitative Characterization ◽  
Tool Materials ◽  
Three Phase ◽  
Grain Growth Kinetics ◽  
The Relationship

A modified three-dimensional Monte Carlo (MC) model in presence of pores and impurities for three-phase nanocomposite ceramic tool materials is successfully established in this paper. Pore migration by surface diffusion is incorporated into the MC model and it is applied to observe and scientific quantitative characterization of three dimensional microstructure evolution and densification process. Some modifications are applied to the simulation algorithm to improve the computing efficiency. The influence of pores on the particle and impurity loaded grain boundaries is simulated and investigated for the study of grain growth kinetics. The relationship between porosity and density is also analyzed. The results indicate that the higher the porosity is, the lower the density will be.

Compositional Design of Multiphase Composite Ceramic Tool Material Based on the Thermal Shock Resistance and Its Application

2004 ◽  
Vol 471-472 ◽  
pp. 21-25 ◽  
Author(s):  
Chong Hai Xu ◽  
Chuan Zhen Huang ◽  
Xing Ai
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Fracture Resistance ◽  
Tool Material ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Ceramic Tool Material ◽  
Shock Resistance ◽  
Optimum Model

Thermal shock resistance is one of the primary properties for the ceramic cutting tool materials with perspectives in high speed machining. An optimum model for the compositional design of the composite ceramic tool materials is built based on the thermal shock resistance. The thermal stress fracture resistance factor R is used to characterize the thermal shock resistance of the ceramic material. Results show that the developed (W,Ti)C/SiC/Al2O3 multiphase ceramic tool material can be expected to achieve the highest thermal shock resistance when the volume fraction of (W,Ti)C and SiC is about 15.8% and 24.8%, respectively. Thermal fracture resistance of the (W,Ti)C/SiC/Al2O3 ceramic tool material is approximately 81-88% higher than that of the pure alumina ceramic when machining the hardened carbon steel, which coincides well with the theoretical prediction from the optimum model. It suggests that the method used here is feasible for the development of ceramic tool materials with designed thermal shock resistance.

scholarly journals Cohesive Element Model for Fracture Behavior Analysis of Al2O3/Graphene Composite Ceramic Tool Material

Crystals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 669 ◽  
Author(s):  
Yongpeng Zhang ◽  
Guangchun Xiao ◽  
Chonghai Xu ◽  
Tingting Zhou ◽  
Mingdong Yi ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Single Phase ◽  
Average Energy ◽  
Tool Material ◽  
Composite Ceramic ◽  
Interface Strength ◽  
Ceramic Tool ◽  
Al2o3 Ceramic ◽  
Tool Materials ◽  
Ceramic Tool Material

The microstructure model of Al2O3/graphene (AG) composite ceramic tool material is established based on Voronoi tessellation. The cohesive element method was used to simulate the crack growth of AG. The effect of cohesive parameters at the grain boundary of Al2O3 and graphene on the crack propagation was investigated. The results show that the grain strength of graphene is too high, the crack propagation to graphene grains will be hindered and cannot propagate forward. Cracks tend to spread along the paths where the crack propagation drive force was high and the resistance was low. When the interface strength between Al2O3 and graphene was at the weak interface, the crack propagation path and length were relatively straight and short. The average energy release rate G C is 1.042 × 10−3 J/m2, which is 2.4% higher than that of single-phase Al2O3 ceramic tool materials. However, if the interface strength between Al2O3 and graphene was at the strong interface, the crack propagated along graphene particles for a short distance, consuming a large amount of fracture energy. Furthermore, the crack will deflect around graphene grains, which increases the crack propagation length. The average energy release rate G C is 1.039 × 10−3 J/m2, which is 2% higher than that of single-phase Al2O3 ceramic tool materials.

Fabrication and Mechanical Properties of Nano-Al2O3 Based Composite Ceramic Tool Material

2011 ◽  
Vol 335-336 ◽  
pp. 736-739
Author(s):  
Xing Li ◽  
Bin Fang ◽  
Xiu Guo Xu ◽  
Chong Hai Xu
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Tool Material ◽  
Composite Ceramic ◽  
Nano Particles ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Technique Effect ◽  
Nano Alumina ◽  
Ceramic Tool Material

The Al2O3(nm)/SiC（μm）/Al2O3（μm）ceramic tool materials were fabricated by the hot-pressing technique. Effect of the compositions on microstructure and mechanical properties is investigated. With nano-particles content decreasing, the flexural strength increased and fine grains can be obtained. When the nano-alumina content is 60wt%, the grain of this sample is fine, the Vickers hardness and flexural strength are 16.24 GPa and 678 MPa, respectively.

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