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Effect of microstructure on friction wear of dental restorative alloys

显微组织对牙科修复合金摩擦磨损的影响

基本信息

批准号：
15592086
负责人：
FUKUI Hisao
金额：
$ 2.24万
依托单位：
Aichi-Gakuin University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15592086/
关键词：
Gold alloy Ag-Pd-Cu-Au alloy Frictio wear Fatigue Microstructure

项目摘要

In oscillatory friction and wear, there exists both fretting and sliding ; however, traditional research conducted in the past have not distinguished between the two. This study examined the friction and wear of several dental alloys with an oscillatory friction and wear testing machine that gauges both frictional force and waveforms, in order to distinguish fretting from sliding. For use in the friction and wear testing machine, flats and riders were constructed from various materials (alloys and cold-sure resin) with varying degrees of hardness. The fretting and sliding tests were conducted with a controlling load of 20N, a vibrating frequency of 2Hz, in various oscillatory amplitudes and in air and Ringer's solution, respectively. The alloys, Ag-Pd-Au alloy (S-12), Type IV gold alloy (PGA-2) and experimental Ti alloy (TNTZ) were used for constructing the flats, and the riders used were made of cold cure resin, stainless steel (SUS304) and the alloys themselves, which came in three different degrees of hardness.As a result, a critical amplitude was found in each of the respective mates, which served as the boundary between fretting and sliding. Frictional force increased with an increase in vibrational amplitude for all friction mates in both fretting and sliding conditions. Also, wear caused by the cold cure resin rider on dental alloys was slight, but fretting wear between the alloys themselves was heavier and produced cracks. Fretting led to more significant surface damage than did sliding, especially for TNTZ/SUS304 and TNTZ/TNTZ.

振荡摩擦磨损中既有微动，也有滑动；然而，过去进行的传统研究并没有区分这两者。本研究用振动摩擦磨损试验机检测了几种牙科合金的摩擦磨损，该试验机测量摩擦力和波形，以区分微动和滑动。为了在摩擦磨损试验机中使用，平垫和座垫由硬度不同的各种材料（合金和冷稳树脂）制成。在控制载荷为20N、振动频率为2Hz的条件下，分别在不同的振荡幅度、空气和林格溶液中进行了微动和滑动试验。合金，Ag-Pd-Au合金（S-12）， IV型金合金（p加-2）和实验钛合金（TNTZ）用于构建平台，所使用的车手是由冷固化树脂，不锈钢（SUS304）和合金本身制成的，它们有三种不同的硬度。结果发现，在每个相应的节点上都有一个临界幅值，作为微动和滑动的边界。在微动和滑动条件下，摩擦力随振动幅值的增加而增加。此外，由冷固化树脂座对牙科合金造成的磨损是轻微的，但合金之间的微动磨损更重，并产生裂纹。微动导致的表面损伤比滑动更明显，特别是对于TNTZ/SUS304和TNTZ/TNTZ。