【摘要】：目的：研究反復熔鑄對鈷鉻、純鈦、鈀基、金鉑4種非鎳基烤瓷合金金瓷結合強度、金瓷斷裂方式和金瓷界面的影響。 方法：(1)從廠家購買的4種非鎳基烤瓷合金在真空加氬氣保護環(huán)境下，不添加新合金熔鑄1～3次，形成金屬基底，上瓷，獲得I代～III代試件，隨機選取一半試件進行冷熱循環(huán)試驗，，剪切試驗方法測試試件的金瓷結合強度。體式顯微鏡觀察剪切試驗后試件的金屬斷裂面，對其斷裂方式進行分類；(2)掃描電鏡觀察4種烤瓷合金試件的金瓷界面形貌，能譜儀檢測金瓷界面的元素擴散寬度。 結果：(1)4種烤瓷合金經(jīng)1～3次熔鑄，金瓷結合強度差異無統(tǒng)計學意義（P＞0.05）。鈷鉻、鈀基和金鉑烤瓷合金冷熱循環(huán)后金瓷結合強度差異無統(tǒng)計學意義（P＞0.05），純鈦烤瓷合金冷熱循環(huán)后的金瓷結合強度下降，且差異有統(tǒng)計學意義（P＜0.05）。反復熔鑄烤瓷合金與冷熱循環(huán)兩因素在金瓷結合強度方面無交互作用（P＞0.05）。（2）4種烤瓷合金經(jīng)1～3次熔鑄后，其金瓷斷裂方式無顯著差異（P＞0.05）。鈷鉻、純鈦烤瓷合金的試件主要表現(xiàn)為粘結斷裂，少數(shù)為混合斷裂；鈀基烤瓷合金試件全部表現(xiàn)為混合斷裂，金鉑烤瓷合金主要表現(xiàn)為混合斷裂，少數(shù)為內聚斷裂，對比4種烤瓷合金的金瓷結合強度值與斷裂方式，二者間無關聯(lián)。（3）經(jīng)1～3次熔鑄后，鈷鉻烤瓷合金金瓷界面形貌I代、II代間無顯著變化，III代界面處局部出現(xiàn)缺陷；純鈦、鈀基、金鉑烤瓷合金I代～III代試件的金瓷界面形貌無顯著變化。經(jīng)1～3次熔鑄后，4種烤瓷合金金瓷界面元素擴散寬度無顯著變化；III代鈀基烤瓷合金氧化層的Ga元素峰值較I代、II代低。 結論：在真空加氬氣保護環(huán)境下，反復熔鑄鈷鉻、純鈦、鈀基、金鉑烤瓷合金1～3次，金瓷結合強度、斷裂方式、金瓷界面元素擴散寬度無顯著變化，冷熱循環(huán)試驗對鈷鉻、鈀基、金鉑烤瓷合金金瓷結合強度無顯著影響，但純鈦烤瓷合金金瓷結合強度顯著降低；熔鑄1～3次的純鈦、鈀基和金鉑烤瓷合金和熔鑄1～2次的鈷鉻烤瓷合金的金瓷界面形貌無顯著變化，熔鑄3次的鈷鉻烤瓷合金金瓷界面局部出現(xiàn)缺陷。
[Abstract]:Aim: to study the effects of repeated melting casting on the metal-porcelain bonding strength, fracture mode and metal-porcelain interface of four kinds of non-nickel based porcelain alloys, namely cobalt chromium, pure titanium, palladium and gold platinum. Methods: (1) four kinds of non-nickel-base porcelain alloys purchased from manufacturers were melted and cast 1 / 3 times without adding new alloy in vacuum and argon protection environment. Half of the specimens were selected randomly for the cold and hot cycle test, and the shear test method was used to test the metal-ceramic bonding strength of the specimens. The fracture surface of the specimens after shear test was observed by type microscope, and the fracture modes were classified. (2) scanning electron microscope (SEM) was used to observe the morphology of the metal-ceramic interface of the four kinds of ceramic alloy specimens, and the diffusion width of the elements at the interface of the metal-porcelain interface was measured by energy spectrometer. Results: (1) there was no significant difference in the bonding strength of 4 kinds of porcelain alloy (P > 0.05). There was no significant difference in the bonding strength of cobalt chromium, palladium base and platinum alloy after cold and hot cycling (P > 0.05), but the bonding strength of pure titanium porcelain alloy decreased after cold and hot cycling (P < 0.05). There was no interaction between the two factors (P > 0. 05). (2). After 1 or 3 times of melting and casting, there was no significant difference in the fracture mode of four kinds of porcelain alloy (P > 0. 05). Co-Cr, pure titanium porcelain alloy mainly shows bond fracture, a few is mixed fracture, palladium base porcelain alloy specimen is mixed fracture, gold platinum alloy is mainly mixed fracture, a few is cohesive fracture. There was no correlation between the strength of metal-porcelain bonding and fracture mode of four kinds of ceramic alloy. (3) after 1 or 3 times of melting, there was no significant change in the interface morphology of Co-Cr alloy between generations I and II, and there were some defects at the interface of generation III, pure titanium, and pure titanium. There was no significant change in the interface morphology of Pd-based, gold-platinum ceramic alloy. After 1 ~ 3 times of melting and casting, the diffusion width of the elements at the interface of the four kinds of porcelain alloy was not significantly changed. The Ga peak value of the oxidation layer of the Palladium based ceramic alloy of generation III was lower than that of the generation I and II. Conclusion: under the condition of vacuum and argon protection, cobalt and chromium, pure titanium, palladium base and gold platinum porcelain alloy were repeatedly melted for one or three times. The bonding strength, fracture mode, diffusion width of elements at the interface of metal and porcelain were not significantly changed, and the cold and hot cycling tests were carried out on cobalt chromium. The bonding strength of Pd-based, gold-platinum porcelain alloy was not significantly affected, but the metal-porcelain bonding strength of pure titanium porcelain alloy decreased significantly. The interface morphology of Pd-base and gold-platinum ceramic alloy and Co-Cr alloy with 1 and 2 times of melting cast has no significant change, but the defects of the interface of the alloy with 3 times of melting cast are observed. The results show that there is no obvious change in the interface between the alloy and the alloy, and the defects occur in the interface of the alloy.
【學位授予單位】：福建醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：R783.6

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