You really can't use the same cork. You would have to purchase a champagne cork stopper. It's a cork stopper that has a clamp on it.
champagne
the tapered part of a champagne cork before it is inserted into a bottle is like a wine cork cylindrical and uniform
a cork regards ´LG
The wire collar that holds the champagne cork in place, is known as a 'muselet'.
Carbon dioxide is produced from yeast. This carbon dioxide causes champagne to bubble and the cork to pop.
Never use a corkscrew on a champagne bottle.
The cap.
Carbon Dioxide (CO2)
Champagne corks are shaped like that due to the extreme pressure in a champagne bottle...the shape helps ensure that the cork will not fly out under the carbonation.
It is a physical change.
Give the champagne a good shake prior to opening it.