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Development of Ceramic Matrix Material by Directed Metal Oxidation Method

金属定向氧化法陶瓷基材料的研制

基本信息

批准号：
14571853
负责人：
KADOKAWA Akihiko
金额：
$ 1.92万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571853/
关键词：
ceramics metal DIMOX method 機械的強度曲げ強さ

项目摘要

In the field of prosthetic dentistry, ceramics restorative materials are highly evaluated because of their esthetic appearance and excellent biocompatibility. However, some disadvantage such as complicated and expensive production procedure, excessive wear of opposing teeth and fracture of ceramics due to brittle properties has been often pointed out. On the other hand, the poor esthetics of metal materials limits their applications for dental use. So we tried to develop new ceramics matrix composites which have superior properties of both ceramics and metal. In the general industrial field, this process is called directed metal oxidation(DIMOX) method, which is to oxidize or nitrify molten metals. Ductile metal is incorporated into brittle ceramics to improve their fracture toughness. New ceramics/metal composites made by DIMOX method are expected to have three dimensionally interconnected structures and obtain excellent physical and mechanical properties. A few studies have investigated about this method for dental restorative materials. The purpose of this study was to fabricate ceramics/metal composites and evaluate fundamental mechanical properties of them for dental applications. The raw materials used in this study were two kinds of alumina(Al_2O_3) powders, which were different in average particle size (1μm and 8μm) and 25μm aluminum(Al) powder. The values of bending strength for Al_2O_3/Al composites were much higher than those of commercially available ceramics materials such as ceramics block for CAD/CAM and castable ceramics. On the contrary, the values of surface hardness of Al_2O_3/Al composites were lower than those of commercially available ceramics materials. Results in this research suggest that particle size and combination of alumina influence mechanical properties of ceramics matrix composites. It was suggested that these composite materials made by DIMOX method were relatively low costs and useful in the field of prosthetic dentistry.

在口腔修复领域，陶瓷修复材料因其外观美观、生物相容性好而受到高度评价。然而，由于陶瓷材料的脆性，其制造工艺复杂、成本高、对置齿磨损严重、陶瓷材料易断裂等缺点也经常被指出。另一方面，金属材料较差的美观性限制了其在牙科中的应用。因此，我们试图开发出兼具陶瓷和金属上级性能的新型陶瓷基复合材料。在一般工业领域，这种工艺被称为直接金属氧化（DIMOX）法，即对熔融金属进行氧化或氮化。韧性金属被结合到脆性陶瓷中以提高其断裂韧性。DIMOX法制备的新型陶瓷/金属复合材料有望获得三维连通结构和优异的物理力学性能。一些研究已经调查了牙科修复材料的这种方法。本研究的目的是制备陶瓷/金属复合材料，并评价其基本的力学性能，用于牙科应用。本研究所用的原料是两种不同平均粒径（1μm和8μm）的氧化铝（Al_2O_3）粉末和25μm的铝粉。Al_2O_3/Al复合材料的抗弯强度远高于CAD/CAM用陶瓷块和铸造陶瓷等市售陶瓷材料。而Al_2O_3/Al复合材料的表面硬度低于市售陶瓷材料。研究结果表明，氧化铝的粒度和组合影响陶瓷基复合材料的力学性能。结果表明，DIMOX法制备的复合材料成本较低，可用于口腔修复领域。

项目成果

期刊论文数量（44）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Effect of alkaline treatment on bonding strength of pure titanium to veneering resin-Evaluation of bonding durability-

碱处理对纯钛与饰面树脂粘接强度的影响-粘接耐久性评价-

DOI：
发表时间：
2002
期刊：
The Journal of the Japanese Society for Dental Materials and Devices 21(40)
影响因子：
0
作者：
Akihiko Kadokawa;Akihiko Kadokawa;Seiji Ban;Seiji Ban;那須智代;篠原直幸;金藤哲明;Takahito Kanie;Takahito Kanie;門川明彦;Seiji Ban;Akihiko Kadokawa
通讯作者：
Akihiko Kadokawa

Takahito Kanie: "Novel Water-blasting Machine for Removal Refractory Investment and Metal Oxide"Prosthodontic Research & Practice. 2・1. 20-26 (2003)

Takahito Kanie：“用于去除难熔物和金属氧化物的新型喷水机”修复研究与实践2・1（2003）。