DEVELOPMENT OF TITANIUM INVESTMENT CASTING MOLD
نویسندگان
چکیده
منابع مشابه
Effect of investment type and mold temperature on casting accuracy and titanium-ceramic bond.
This study evaluated the casting accuracy of crown margins and metal-ceramic shear bond strength (SBS) of pure titanium injected into casting molds made using 2 investment types at 3 mold temperatures. Sixty crown (30-degree beveled finish line) and 60 cylinder (5mm diameter × 8mm high) patterns were divided into 6 groups (n=10), and cast using a phosphate-bonded investment (P) and a magnesium ...
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and porcelain-fused-to-metal restorations instead of gold or silver alloys. This tendency seems to be the same a]1 over the world, However, the expanded use of nickel-containing base metal alloys in dentistry has raised questions concerning their biological s fety, namely, carcinogenic and sensitivity risks.i) On the other hand, since pure titanium or titanium-based alloys have excellent biocom...
متن کاملEffects of Replacing Fluorine with Sodium and Titanium Oxides on Continuous Casting of Steel Mold Powders Lubrication
Mold powders are used as raw materials in continuous casting of steel industry; Also they are mostly composed of aluminum, calcium, silica oxides, alkaline and earth-alkaline oxides along with carbon and fluor. Two of the most important duties of mold powders are the lubrication of the space between mold walls and steel shell, and heat transfer control between steel shell and the copper mold. F...
متن کاملMold filling and dimensional accuracy of titanium castings in a spinel-based investment.
OBJECTIVES Aim of the study was to analyze the mold filling capacity and the dimensional accuracy of a spinel-based investment for titanium castings. METHODS Expansion of the investment in dependence of the preheating temperature was measured in a dilatometer. The degree of transformation of MgO and Al2O3 to spinel (MgAl2O4) was evaluated by means of X-ray powder diffraction. Mold filling cap...
متن کاملEffect of zirconia-modified magnesia investment on the casting of pure titanium.
Several investigations have examined magnesia-based investments for pure titanium casting. However, the thermal expansion value was insufficient at low casting temperatures and high interfacial reactivity occurred at high casting temperatures. The purpose of this investigation was to modify a magnesia-based investment by adding a heat-resistant mold material, zirconia, in different ratios to pr...
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ژورنال
عنوان ژورنال: Journal of Advanced Science
سال: 1992
ISSN: 1881-3917,0915-5651
DOI: 10.2978/jsas.4.4_c2