Simulation of Microstructure Evolution for Two-Phase Ceramic Tool Materials at Different Duration Time

2010 ◽  
Vol 97-101 ◽  
pp. 3042-3045
Author(s):  
Bin Fang ◽  
Chuan Zhen Huang ◽  
Chong Hai Xu ◽  
Sheng Sun
Keyword(s):  
Two Dimensional ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Two Phase ◽  
Tool Materials ◽  
Duration Time ◽  
Mean Grain Size ◽  
The Mean ◽  
The Relationship ◽  
Simulation Time

A computer simulation of the sintering process of two-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from the realistic microstructure. The relationship between simulation time and real duration time has been proposed. The mean grain size of simulated microstructure increases with an increase in simulation time, which is consistent with the experimental results.

Simulation of Microstructure Evolution Coupled with Fabrication Pressure for Two-Phase Ceramic Tool Materials

2010 ◽  
Vol 431-432 ◽  
pp. 138-141
Author(s):  
Chuan Zhen Huang ◽  
Bin Fang ◽  
Chong Hai Xu ◽  
Sheng Sun ◽  
Han Lian Liu
Keyword(s):  
Monte Carlo ◽  
Microstructure Evolution ◽  
Potts Model ◽  
Two Dimensional ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Two Phase ◽  
Tool Materials ◽  
Mean Grain Size ◽  
The Mean

A computer simulation coupled with fabrication pressure for the sintering process of two-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from the realistic microstructure. The mean grain size of simulated microstructures by Monte Carlo Potts model integrated with pressure increases with an increase in fabrication pressure, which is consistent with the experiment results. Monte Carlo Potts model coupled with fabrication pressure is suitable for simulating the microstructure evolution at the different fabrication pressure during the fabrication of ceramic tool materials.

Simulation of Microstructure Evolution Coupled with Fabrication Temperature for Two-Phase Ceramic Tool Materials

2010 ◽  
Vol 431-432 ◽  
pp. 134-137
Author(s):  
Bin Fang ◽  
Chuan Zhen Huang ◽  
Chong Hai Xu ◽  
Sheng Sun ◽  
Bin Zou
Keyword(s):  
Computer Simulation ◽  
Microstructure Evolution ◽  
Two Dimensional ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Two Phase ◽  
Tool Materials ◽  
Grain Sizes ◽  
The Mean ◽  
The Relationship

A computer simulation coupled with fabrication temperature for the sintering process of two-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from the realistic microstructure. The relationship between fabrication temperature and microstructure evolution is proposed. The mean grain sizes of simulated microstructures by Monte Carlo Potts model integrated with fabrication temperature increase with an increase in fabrication temperature, which is consistent with the experiment results.

Simulation of Fabrication for Single-Phase Al2O3 Ceramic Tool Materials at Different Fabrication Pressure

2012 ◽  
Vol 499 ◽  
pp. 150-155 ◽  
Author(s):  
Bin Fang ◽  
Chuan Zhen Huang ◽  
Chong Hai Xu ◽  
Sheng Sun
Keyword(s):  
Monte Carlo ◽  
Microstructure Evolution ◽  
Potts Model ◽  
Single Phase ◽  
Two Dimensional ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Mean Grain Size ◽  
The Mean ◽  
The Relationship

The relationship between fabrication pressure and microstructure evolution is proposed. A computer simulation coupled with fabrication pressure for the hot-pressing process of single-phase ceramic tool materials has been developed, which uses a two-dimensional hexagon lattice model mapped from the realistic microstructure without considering the presence of pores. The fabrication of single-phase Al2O3 is simulated. The mean grain size of simulated microstructure by Monte Carlo Potts model integrated with fabrication pressure increases with an increase in fabrication pressure, which is consistent with the experiment results. It is shown that Monte Carlo Potts model coupled with fabrication pressure may simulate the microstructure evolution of single-phase ceramic tool materials.

Simulation of Fabrication for Single-Phase Al2O3 Ceramic Tool Materials at Different Fabrication Temperature

2010 ◽  
Vol 150-151 ◽  
pp. 1358-1363
Author(s):  
Bin Fang ◽  
Chuan Zhen Huang ◽  
Chong Hai Xu ◽  
Sheng Sun
Keyword(s):  
Mechanical Properties ◽  
Computer Simulation ◽  
Grain Size ◽  
Monte Carlo ◽  
Single Phase ◽  
Two Dimensional ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Mean Grain Size ◽  
The Mean

The fabrication is a key process for the preparation of ceramic tool materials, which governs the mechanical properties of ceramic tool materials under the condition of the same compositions. A computer simulation coupled with fabrication temperature for the hot-pressing process of single-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from the realistic microstructure without considering the presence of pores. The fabrication of single-phase Al2O3 is simulated. The mean grain size of simulated microstructure by Monte Carlo Potts model integrated with fabrication temperature increases with an increase in fabrication temperature, which is consistent with the experiment results.

Simulation of the Effect of Sintering Temperature on Microstructure Evolution in Nanocomposite Ceramic Tool Materials

2013 ◽  
Vol 770 ◽  
pp. 194-197
Author(s):  
Hong Mei Cheng ◽  
Chuan Zhen Huang ◽  
Xiu Ye Wang
Keyword(s):  
Grain Growth ◽  
Microstructure Evolution ◽  
Sintering Temperature ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Mean Grain Size ◽  
Higher Temperature ◽  
The Mean ◽  
Simulation Results

A Monte Carlo Potts model coupled with sintering temperature for the sintering process of nanocomposite ceramic tool materials is proposed, the relation between grain growth and sintering temperature is presented. The grain growth process at different sintering temperature is investigated in this model, and the effect of sintering temperature on microstructure evolution is discussed, it is found that the mean grain size increases with the increase of sintering temperature during simulation, and nanoparticles are easier to enter into matrix grains to form intragranular-type microstructure at higher temperature. The simulation results are in accordance with the experimental observations.

Simulation of the Effect of Sintering Pressure on Microstructure Evolution in Nanocomposite Ceramic Tool Materials

2013 ◽  
Vol 395-396 ◽  
pp. 262-265 ◽  
Author(s):  
Hong Mei Cheng ◽  
Chuan Zhen Huang
Keyword(s):  
Grain Size ◽  
Monte Carlo ◽  
Grain Growth ◽  
Microstructure Evolution ◽  
Growth Process ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Mean Grain Size ◽  
The Mean

A Monte Carlo Potts model coupled with sintering pressure for the sintering process of nanocomposite ceramic tool materials is proposed, the relation between grain growth and sintering pressure is presented. The grain growth process at different sintering pressure is investigated in this model, and the effect of sintering pressure on microstructure evolution is discussed, it is found that the mean grain size increases with the increase of sintering pressure during simulation. The results from this simulation are shown to correlate well with the experimental observations.

Numerical Simulation on the Sintering Process of Nanocomposite Ceramic Tool Materials

2012 ◽  
Vol 500 ◽  
pp. 519-524
Author(s):  
Hong Mei Cheng ◽  
Chuan Zhen Huang ◽  
Bin Zou ◽  
Hong Tao Zhu ◽  
Han Lian Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Growth Rate ◽  
Model Simulation ◽  
Ceramic Matrix ◽  
Ceramic Materials ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Two Phase ◽  
Tool Materials ◽  
Simulation Results

A Monte Carlo Potts model for the sintering process of two-phase nanocomposite ceramic tool materials is proposed. The grain growth, pore diffusion and vacancy annihilation at grain boundaries are simulated in the model. Simulation results are presented and discussed. It is found that pore and nanophase can pin the ceramic matrix and decrease the growth rate of matrix grain during the microstructure evolution. The addition of nanoparticles is not only beneficial to the refinement of ceramic matrix grain and the formation of intra/intergranular-type microstructure but also advantageous to the densification of ceramic materials.

Efect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy

2013 ◽  
Vol 586 ◽  
pp. 222-225
Author(s):  
Martin Petrenec ◽  
Eva Vraspírová ◽  
Karel Němec ◽  
Milan Heczko
Keyword(s):  
Heat Treatment ◽  
Columnar Structure ◽  
Cyclic Heat Treatment ◽  
Two Phase ◽  
Cast Structure ◽  
Mean Grain Size ◽  
Cyclic Heat ◽  
The Subject ◽  
The Mean ◽  
Fully Lamellar

The subject of the article is focused on the refining of the cast structure of gamma TiAl–2Nb alloy using cyclic heat treatment and on the analysis of the grain refining mechanism. Microstructure evolution after applied cycles of heat treatment was characterized using light, laser and electron microscopy and using microhardness tests. Application of five heat treatment cycles during which two phase transformations (eutectoid and alfa-recrystallization reactions) repeatedly took place resulted αin refining of the cast columnar structure. The mean grain-lamellar colony size 0.512 mm was transformed to fully lamellar structure containing gamma and alfa2 phases having the mean grain size 0.229 mm. Lamellae thickness of gamma was not changed while the thickness of alfa2 phase decreased to 78 nm. Refining of alfa2 phase resulted in the increase of the microhardness by 20 %. The recrystallized cast structure obtained by cyclic heat treatment and the knowledge on the mechanisms of the refining the structure were compared and discussed with the literature data.

Effect of Fabrication Parameters on Mechanical Properties of Al2O3 Ceramic Tool Materials

2008 ◽  
Vol 375-376 ◽  
pp. 97-101 ◽  
Author(s):  
Bin Fang ◽  
Chuan Zhen Huang ◽  
Han Lian Liu ◽  
Chong Hai Xu
Keyword(s):  
Mechanical Properties ◽  
Orthogonal Experiment ◽  
Influence Factors ◽  
Hot Press ◽  
Ceramic Tool ◽  
Range Analysis ◽  
Tool Materials ◽  
Duration Time ◽  
Orthogonal Experiments ◽  
Fabrication Parameters

In order to investigate the effect of hot-press fabrication parameters on mechanical properties of Al2O3 ceramic tool materials, the orthogonal experiment method was used. In the experiments, the three influence factors such as the fabrication temperature, pressure and duration time are considered. The experimental results are analyzed by a range analysis of orthogonal experiments. It is shown that the most important factor that affects the mechanical properties is the fabrication temperature and the followed factors are the fabrication pressure and the duration time of fabrication. Scanning electron microscope (SEM) reveals that the hot-press fabrication parameters will significantly affect the microstructure of ceramic tool materials, which can govern the mechanical properties. This has been validated by the orthogonal experiments in the present paper.

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