52.在金屬瓷冠中,有關金屬與瓷之線性熱膨脹係數間,最佳的關係與瓷內部殘餘應力(residual stress)之敘 述,下列何者正確?
(A)金屬比瓷小0.5×
/℃,瓷內部呈抗張應力(tensile stress)狀態
(B)金屬比瓷大0.5×
/℃,瓷內部呈抗張應力(tensile stress)狀態
(C)金屬比瓷小0.5×
/℃之內,瓷內部呈壓縮應力(compressive stress)狀態
(D)金屬比瓷大0.5×
/℃之內,瓷內部呈壓縮應力(compressive stress)狀態
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統計: A(74), B(271), C(167), D(649), E(0) #2626927
統計: A(74), B(271), C(167), D(649), E(0) #2626927