This question already has an answer here:
Documentation https://angular.io/docs/ts/latest/guide/router.html states
... By default, the router reuses a component instance when it re-navigates to the same component type without visiting a different component first. The parameters can change between each re-use...
but there is no hint how to change this default-behavior.
Is it possible to prevent the re-use?
This is currently not supported. There are plans to add support for some configurability in one of the next versions.
See also the discussion in https://github.com/angular/angular/issues/9811
That's now fixed by https://github.com/angular/angular/pull/13124
See also https://www.softwarearchitekt.at/post/2016/12/02/sticky-routes-in-angular-2-3-with-routereusestrategy.aspx