Contribution of electrospark alloying to the oxidation resistance of hard tungsten alloys

被引：7

作者：

Verkhoturov, A. D. ^{[1
]}

Shpilev, A. M.

Gordienko, P. S. ^{[2
]}

Konevtsov, L. A. ^{[1
]}

Panin, E. S. ^{[2
]}

Podchernyaeva, I. A. ^{[3
]}

Panasyuk, A. D. ^{[3
]}

机构：

[1] Russian Acad Sci, Khabarovsk Sci Ctr, Inst Mat Sci, Far Eastern Dept, Khabarovsk, Russia

[2] Russian Acad Sci, Khabarovsk Sci Ctr, Inst Mat Sci, Far Eastern Dept, Vladivostok 690022, Russia

[3] Natl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, Ukraine

来源：

POWDER METALLURGY AND METAL CERAMICS | 2008年 / 47卷 / 1-2期

关键词：

hard tungsten alloys; carbides; electron structure; oxidation resistance; oxidation; electrospark alloying; ceramics;

D O I：

10.1007/s11106-008-0015-2

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The paper examines the contribution of electrospark alloying to the oxidation resistance of hard tungsten alloys. It is established that the oxidation of carbides results from their electronic structure. When WC and hard tungsten alloys are heated to 1000 degrees C, a brittle scale consisting of WO(3) and CoWO(4) rapidly forms. The oxidation resistance reduces as follows: TiC -> Co -> W -> HTA (if TiC is more than 10%)-> WC-Co -> WC. The oxidation rate of hard tungsten alloys may be a criterion of their serviceability. It is shown that the oxidation resistance of hard tungsten alloys becomes much higher after their electrospark alloying with aluminum, titanium, and chromium and with wear-resistant composite TsLAB-2 ceramics based on the ZrB(2)-ZrSi(2)-LaB(6) system with Ni-Cr-Al (30 mole%) binder.

引用

页码：112 / 115

页数：4

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