Analyzing International Scientific Collaboration in Materials Science Through Co-authorship

International scientific collaboration has growing rapidly for all countries. This paper looks into the international scientific collaboration for USA, China, Germany, England and Japan from co-authorship by using data from ESI hot papers in materials science. Association analysis has been introduced to examine in pairs the cooperative relation between the countries. We find that USA takes the dominant position in the internationally co-authored papers in materials science, and China ranks the second. USA and China are closely connected in co-authored papers, and China relies more on the cooperation with USA than USA on China. England and Germany cooperate more than any other pairs. USA, China, Germany, and England collaborate less with Japan respectively.