No it will not be possible, Its not possible when the number of nodes is greater than 1. You have to have inorder to construct the unique Binary tree.
Let consider the following tree,
Pre-Order (Root-Left-Right) will be : 1, 2
Post-Order (Left-Right-Root) will be : 2, 1
Now consider this tree,
Pre-Order (Root-Left-Right) will be : 1, 2
Post-Order (Left-Right-Root) will be : 2, 1
See, Both are giving the same preorder and postorder traversal. Hence its not possible to have unique Binary tree.