si–c shock activation of green mixtures for shs production of si–c composites sergey skiba, gh....
DESCRIPTION
1 –electrical detonator; 2 – charge of ES; 3 – plate-piston; 4 – activated powder; 5 – container of conservation; 6 – plate-basic; 7 - ground; 8 –elements for fixation weld gap. Parameters 1234 Тhickness of plates- foundation, мм 12 Height of ES, мм Height weld gap, мм Detonation velosity, м/s 3600 Percussion velosityдарения, м/s Share of the reflected wave, % 20 Progress of SHS process --++ Shock-wave activationTRANSCRIPT
Shock activation of green mixtures for SHS production
of Si–CSi–C composites
Sergey Skiba, Gh. G. PakSergey Skiba, Gh. G. Pak
XII International symposium on explosive production of new materials: science, technology, business and innovations
(EPNM-2014)
Cracow 2014
Si + C = SiC+Q
System Q, кДж/кg Tad, К,
Ti + B 2770 25005Ti + 3Si 1790 2350
Ti + C 2990 3070Tа + C 670 2550Si + C 73 1800
Methods of increase reactionary ability of Si-C system
SHS in additional electric field
SHS systems Si-C in the environment of nitrogen
Chemical activation of SHS process
Mechanical activation of initial mix
SHS with preliminary heating of a reactionary layer
Heat and combustion temperature for some SHS sytems
Increase of reaction ability
1 –electrical detonator; 2 – charge of ES; 3 – plate-piston; 4 – activated powder; 5 – container of conservation; 6 – plate-basic; 7 - ground; 8 –elements for fixation weld gap.
Parameters 1 2 3 4Тhickness of plates-foundation, мм 12
Height of ES, мм 60 60 65 65Height weld gap, мм 2 3
23
Detonation velosity, м/s
3600
Percussion velosityдарения, м/s
600 670 700 750
Share of the reflected wave, % 20
Progress of SHS process
- - + +
SShock-wave activationhock-wave activation
Before activation
Microstructure of Si-C powder
After activation
E-mail: [email protected]
Тел./fax. : 8 (8412) 38 84 93
XII International symposium on explosive production of new materials: science, technology, business and innovations
(EPNM-2014)
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