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不同热处理对自研新型高钯牙科合金腐蚀行为的影响 被引量:3
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作者 刘嘉俊 孟玉坤 《口腔疾病防治》 2017年第2期80-86,共7页
目的评估不同热处理对自研高钯合金腐蚀行为的影响。方法将不同温度热处理后的自研高钯合金按照ISO 10271:2001/Cor.1:2005(E)标准进行电化学腐蚀实验,以商品化Spartan?Plus合金作为对照组。在电化学实验中,依次进行2 h开路电位(Eocp)... 目的评估不同热处理对自研高钯合金腐蚀行为的影响。方法将不同温度热处理后的自研高钯合金按照ISO 10271:2001/Cor.1:2005(E)标准进行电化学腐蚀实验,以商品化Spartan?Plus合金作为对照组。在电化学实验中,依次进行2 h开路电位(Eocp)测定并记录极化曲线,然后拟合出腐蚀电位(Ecorr)、腐蚀电流密度(Icorr)等相关电化学参数。同时,使用扫描电镜观察合金腐蚀前后的表面形貌。结果热处理不同程度地改善了两种合金在ISO10271电化学实验中的耐腐蚀性。其中,两种合金的500℃组电化学参数最佳,耐腐蚀性最好,但尚不能认为两者之间的耐腐蚀性能有差别。对比电化学实验腐蚀前后的试件表面形貌,两种合金的所有组别均可见腐蚀后的点蚀现象和裂隙腐蚀现象,随着热处理温度的升高,点蚀和裂隙腐蚀逐渐变少。两种合金各组间横向比较,未发现明显的点蚀和裂隙腐蚀分布的差异。结论对于高钯合金而言,高含量的钯基质相使合金的组分变化并不足以对合金的腐蚀行为产生明显改变。两种合金在耐腐蚀性方面的相似性可能归因于合金自身的高钯含量。 展开更多
关键词 牙科铸造合金 高钯合金 热处理 腐蚀行为 电化学实验
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Lubrication properties of silver-palladium alloy prepared by ion plating method for high temperature stud bolt 被引量:2
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作者 Jung-Dae KWON Sunghun LEE +3 位作者 Koo-Hyun LEE Jong-Joo RHA Kee-Seok NAN Se-Hun KWON 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第A01期12-16,共5页
As a solid lubricant, silver-palladium (Ag-Pd) alloy coating was investigated for the application to high temperature stud bolt. A glue layer nickel (Ni) film was deposited on the surface of the hex bolt sample and th... As a solid lubricant, silver-palladium (Ag-Pd) alloy coating was investigated for the application to high temperature stud bolt. A glue layer nickel (Ni) film was deposited on the surface of the hex bolt sample and then Ag-Pd alloy coating was performed on it using ion plating method. The friction coefficient of Ag-Pd alloy film coated bolt was lower than that of N-5000 oil coated bolt by the result of axial force measurement. The cyclic test of heat treatment was conducted to evaluate the durability of Ag-Pd alloy film coated bolt. In a cycle, sample was assembled into the block using torque wrench, followed by heating and disassembling. It was not successful to disassemble the N-5000 oil coated bolt from the block after only one cycle. However, the Ag-Pd alloy film coated bolt was able to be disassembled softly till 12 cycles. 展开更多
关键词 solid lubricant silver-palladium alloy ion plating
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