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1. 发明申请

WO1998029334A1 PROCESS FOR PREPARING ALUMINUM NITRIDE 审中-公开
标题翻译：制备氮化铝的方法
公开(公告)号：WO1998029334A1
公开(公告)日：1998-07-09
申请号：PCT/JP1996003867
申请日：1996-12-26
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , MIURA, Hirohisa , MATSUBARA, Nagayoshi , HASHIMOTO, Masaoki , YOKKA, Junichi
发明人： TOYOTA JIDOSHA KABUSHIKI KAISHA
IPC分类号： C01B21/072
CPC分类号： C01B21/0722 , C01P2004/61 , C01P2004/62 , C01P2006/12
摘要： A process for preparing aluminum nitride, characterized by directly nitriding a mixed raw material powder comprising 50 to 97 % by weight of a coarse aluminum powder having a sieve opening as stipulated by JIS of 210 mu m (70 mesh) or an aluminum alloy powder with the balance (50 to 3 % by weight) consisting of at least one powdery nitriding accelerator selected among aluminum and aluminum alloy powders having a sieve opening of 210 mu m (70 mesh) in a nitrogen gas atmosphere at 500 to 1000 DEG C. This process can provide aluminum nitride which can be easily broken by hand in a mortar.
摘要翻译：一种制备氮化铝的方法，其特征在于将包含50至97重量％的具有JIS210μm（70目）所规定的筛孔的粗铝粉末或铝合金粉末的混合原料粉末直接氮化，余量（50〜3重量％）由在氮气气氛中在500〜1000℃下选择的筛孔为210μm（70目）的铝和铝合金粉末中的至少一种粉末状氮化促进剂组成。工艺可以提供氮化铝，其可以容易地用手在研钵中破碎。

2. 发明申请

WO1997031202A1 ALUMINUM PISTON FOR INTERNAL COMBUSTION ENGINES 审中-公开
标题翻译：用于内燃机的铝活塞
公开(公告)号：WO1997031202A1
公开(公告)日：1997-08-28
申请号：PCT/JP1997000521
申请日：1997-02-24
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , MIURA, Hirohisa , YAMADA, Yasuhiro , MICHIOKA, Hirofumi , MATSUBARA, Nagayoshi , HASHIMOTO, Masaoki
发明人： TOYOTA JIDOSHA KABUSHIKI KAISHA
IPC分类号： F16J01/01
CPC分类号： C23C8/24 , F16J1/01
摘要： An aluminum piston for an internal combustion engine comprises a cylindrical-shaped piston skirt portion in slide contact with a cylinder wall of an internal combustion engine, a cylindrical-shaped intermediate portion extending from the piston skirt portion and formed with top ring grooves, and a piston top surface extending from the intermediate portion to define a combustion chamber, wherein surface portions of the top ring grooves or surface portions of the piston top surface or both being composed of a nitriding layer. Preferably, the nitriding layer forming the surface portions of the top ring grooves or the piston top surface has a hardness of Hv 300 or more and a depth of 20 mu m. Also, it is preferable to form a nitriding layer on surface portions of the piston skirt portion. The aluminum piston is excellent in abrasion resistance and heat resistance. Accordingly, the aluminum piston can be used for internal combustion engines such as engines and diesel engines which rotate at high speeds.
摘要翻译：用于内燃机的铝活塞包括与内燃机的气缸壁滑动接触的圆柱形活塞裙部，从活塞裙部延伸并形成有顶环槽的圆柱形中间部分，以及活塞顶表面从中间部分延伸以限定燃烧室，其中顶环槽或活塞顶表面的表面部分或者两者的表面部分由氮化层组成。优选地，形成顶环槽或活塞顶面的表面部分的氮化层的硬度为Hv 300以上，深度为20μm。此外，优选在活塞裙部的表面部分上形成氮化层。铝活塞耐磨性和耐热性优异。因此，铝活塞可以用于高速旋转的发动机和柴油发动机等内燃机。

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