Finite element simulation of the effects of process parameters on deposition uniformity of chemical-vapor-deposited silicon carbide

2009 ◽  
Vol 46 (4) ◽  
pp. 1002-1006 ◽  
Author(s):  
Guodong Sun ◽  
Hejun Li ◽  
Qiangang Fu ◽  
Min Huang ◽  
Wei Cao ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Process Parameters ◽  
Chemical Vapor ◽  
Element Simulation ◽  
Chemical Vapor Deposited ◽  
Deposition Uniformity

Finite Element Simulation of Vacuum Hot Bulge Forming of Titanium Alloy Cylindrical Workpiece

2011 ◽  
Vol 675-677 ◽  
pp. 921-924 ◽  
Author(s):  
Ming Wei Wang ◽  
Chun Yan Wang ◽  
Li Wen Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Titanium Alloy ◽  
Finite Element Simulation ◽  
Process Parameters ◽  
Fe Model ◽  
Analysis Software ◽  
Forming Process ◽  
Element Simulation ◽  
Cylindrical Workpiece

Vacuum hot bulge forming (VHBF) is becoming an increasingly important manufacturing process for titanium alloy cylindrical workpiece in the aerospace industries. Finite element simulation is an essential tool for the specification of process parameters. In this paper, a two-dimensional nonlinear thermo-mechanical couple FE model was established. Numerical simulation of vacuum hot bulge forming of titanium alloy cylindrical workpiece was carried out using FE analysis software MSC.Marc. The effects of process parameter on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece was analyzed by numerical simulation. The proposed an optimized vacuum hot bulge forming process parameters and die size. And the corresponding experiments were carried out. The simulated results agreed well with the experimental results.

Finite Element Simulation of Effects of Process Parameters on Deposition Rate of SiC by Chemical Vapor Deposition

2009 ◽  
Vol 610-613 ◽  
pp. 635-640 ◽  
Author(s):  
Guo Dong Sun ◽  
He Jun Li ◽  
Shou Yang Zhang ◽  
Qian Gang Fu ◽  
Wei Cao ◽  
...  
Keyword(s):  
Finite Element ◽  
Deposition Rate ◽  
Process Parameters ◽  
Vapor Deposition ◽  
Deposition Temperature ◽  
Volume Ratio ◽  
Chemical Vapor ◽  
Deposition Behavior ◽  
Element Simulation ◽  
Mixed Gases

A two-dimensional mathematical model for deposition behavior of SiC coating on C/C composites in a hot-wall CVD reactor was developed. Deposition rate of SiC was calculated by finite element method and optimized by using an orthogonal L9(3)4 test. The single and coupling effects of process parameters on deposition rate of SiC, including deposition temperature, the flux of mixed gases, the volume ratio of H2 and Ar, and that of MTS and mixed gases, were calculated and discussed. The optimal deposition rate of SiC was obtained.

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