(中南大學(xué) 冶金科學(xué)與工程系，長沙 410083)
摘 要: Fe-Cr合金對一氧化鈦的潤濕性能較差，在熔點(diǎn)溫度下各成分的Fe-Cr合金在一氧化鈦上的潤濕角都在90°左右。當(dāng)鉻含量≤50%時(shí)，F(xiàn)e與TiO間存在界面反應(yīng)，生成Fe2Ti和Ti3O2。但界面反應(yīng)的產(chǎn)生，并不能有效改善其 潤濕性。隨著潤濕溫度的升高，合金的潤濕性略有改善。在Fe-Cr合金中添加少量的表面活性物質(zhì)Si，可改善Fe-Cr合金在一氧化鈦上的潤濕性。因?yàn)樵跐櫇襁^程中Si在界面的富集，不僅降低了界面能和液相表面張力，有效改善了合金的潤濕性，而且阻止了Fe與TiO間的界面反應(yīng)，使反應(yīng)型潤濕轉(zhuǎn)變?yōu)榉欠磻?yīng)型潤濕。添加合金元素Si1.5%以上，可使?jié)櫇窠墙抵?5°左右。
關(guān)鍵字: 潤濕性；一氧化鈦；Fe-Cr合金；合金元素
Fe-Cr on TiO
（Department of Metallurgical Science and Engineering，
Central South University，Changsha 410083, China）
Abstract:The wetting characteristics of Fe-Cr on TiO were studied. The results indicate that the wettability of Fe-Cr on TiO is not well, the wetting angles of Fe-Cr of various components on TiO are all about 90° at melting point temperature. The interface reaction takes place with resultants of Fe2Ti and Ti3O2 when Cr content is lower or equal to 50% in mass fraction. But the interf ace reaction can not improve the wettability effectively. The wettability is improved slightly at higher wetting temperature. The wettability of Fe-Cr on TiO can be improved by adding in a little of Si as surface-active matter. Si can not only reduce the interface energy and the liquid phase surface tension, but also prevent the interface reaction between Fe2Ti and Ti3O2 through the enrichment of Si on the interface during wetting. The reaction wetting is changed into no-reaction wetting, when Si is added to 1.5% or more, while the wetting angles is reduced to about 25°.
Key words: wettability；titanium monoxide；Fe-Cr alloy；alloy additives
