6LAI P L, CHEN W C, WANG J C, etal. A newly developed cal- cia/titanium modified magnesia based investment mold for titani- um casting[J]. Materials Science and Engineering, 2011, C31 (2) :144-150.
7TSUTSUMI H, NIINOMI M, AKAHORI T, etal. Quality im- provement of a 13-type titanium alloy cast for biomedical applica- tions by using a clacia mold[J]. Materials Transactions, 2010, 51 (1) : 128-135.
