When was Avengers in Sci-Fi created?

It seems like you might be thinking of "Avengers" as a comic book series, which was created in 1963.

However, there isn't a known Sci-Fi series specifically named "Avengers in Sci-Fi". Could you be thinking of a different title or perhaps a specific story or character within the Avengers universe that has a science fiction theme?

If you can give me more information, I might be able to help you find what you're looking for.