A new technology for direct restorative alloys.

A new technology for direct restorative alloys.
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直接修复合金新技术。

DOI:
10.1016/0109-5641(95)80020-4
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发表时间:
1995
期刊:
Dental materials : official publication of the Academy of Dental Materials
影响因子:
--
通讯作者:
Ratzker,M
Ratzker,M
中科院分区:
--
文献类型:
--
作者:
Dariel,MP;Lashmore,DS;Ratzker,M

文献摘要

参考文献

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目标。本研究的目的是开发一种制备无汞金属口腔修复材料的新工艺。方法:研究方法。这种新的方法依赖于表面处理过的银粒子的冷焊。在常温下,金属间化合物在银-锡界面自发形成。研究了元素银、TiN和预合金镀银粉末的不同混合物在常温、中压和短时间内松散粉末的固结能力。旨在去除银表面氧化层的表面处理是用稀酸进行的。测定了几种固结粉末混合物的抗压强度和横向抗折强度。经过表面处理的粉末颗粒的冷焊发生在银-银界面上,并通过暴露在温和的酸中而促进。含有大约50%的银粉、40%的镀银银锡金属间化合物颗粒和从水溶液中沉积的少量银锡的粉末混合物显示出非常好的冷凝性,这取决于可用的银-银界面面积的量。抗折强度(200 Mpa)高于银汞合金,而抗压强度(120 Mpa)和硬度(100 KHN)低于银汞合金。无汞银锡粉混合物可加工成金属复合牙科修复材料。
Objectives. The purpose of this study was to develop a new technology for preparing mercury-free metallic dental restorative materials. Methods. The novel approach relies on the cold welding of surface-treated silver particles. At ambient temperatures, intermetallic compound formation takes place spontaneously at the silver-tin interface. The ability of a loose powder to consolidate at ambient temperature under moderate pressure and within a short time duration was investigated for various mixtures of elemental silver, tin, and pre-alloyed silver-coated powders. Surface treatment aimed at removing silver surface oxide layers is done with a dilute acid. The compressive and the transverse rupture strengths of several of the consolidated powder mixtures were determined. Cold-welding of surface-treated powder particles takes place across the silver-silver interface and is promoted by exposure to a mild acid. Powder mixtures containing approximately 50% silver powder, 40% silver-coated silver-tin intermetallic compound particles, and a small silver-tin fraction deposited from an aqueous solution display very good condensability, depending on the amount of silver-silver interface area available. The attained rupture strength values (200 Mpa) were higher than those of amalgams; the compressive strengths (120 MPa) and hardness values (100 KHN), however, were lower than those found for amalgams. Mercury-free silver-tin powder mixtures can be processed for use as metallic composite dental restorative materials.
镓基合金的阳极极化行为和微观结构。
DOI: --
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影响因子: 5
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DOI: --
发表时间: 1974
期刊: Journal of Biomedical Materials Research
影响因子: --
作者:
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期刊:
影响因子: --
作者:
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DOI: --
发表时间: 1991
期刊: The Journal of the American Dental Association (1939)
影响因子: --
作者:
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