Some links to travel scholarships for PG students
First you should seek out support from you College and the Department of Materials.
In advance of your travel there are various scholarships to help the support.
Santander Scholarship (Research only)
http://www.ox.ac.uk/students/fees-funding/international/scholarships-exchanges/santander
Sasakawa Fund (Japan)
http://www.orinst.ox.ac.uk/administration/trust_funds/sasakawa_fund.html