( 1. 西安交通大學(xué) 金屬材料強(qiáng)度國家重點(diǎn)實(shí)驗(yàn)室，西安 710049；
2. 西安理工大學(xué) 材料科學(xué)與工程學(xué)院， 西安 710048)
摘 要: 通過差熱分析確定了含Cr量分別為0， 0.25％， 0.5％， 1.0％， 2.0％， 4.0%(摩爾分?jǐn)?shù))的CuMnCr合金的熔化溫度。 采用座滴法測(cè)量了不同溫度下不同Cr含量的CuMnCr合金在石墨表面的鋪展面積和接觸角。 在真空氣氛中Mn的蒸發(fā)引起CuMnCr合金在石墨表面的潤(rùn)濕性隨溫度變化而變化， 不同Cr含量的CuMnCr合金在石墨表面的接觸角在960 ℃時(shí)最小。 不同Cr含量的合金在不同溫度下表現(xiàn)出最佳的鋪展面積， 隨含Cr量的增加界面反應(yīng)層的厚度增加。 通過X射線衍射分析不含Cr和含Cr的合金界面反應(yīng)產(chǎn)物分別為Mn7C3和CrxCy。
關(guān)鍵字: 座滴法； CuMnCr合金； 潤(rùn)濕性； 石墨
（ 1. State Key Laboratory of Mechanical Behavior for Materials,
Xi'an Jiaotong University, Xi'an 710049, China;
2. Department of Materials Science and Engineering,
Xi'an University of Technology, Xi'an 710048, China）
Abstract: By thermal analysis (DSC) the melting temperatures of CuMnCr alloys were decided and the sessile drop method was used to study the wetting behavior of CuMnCr series alloys on graphite surface. The results show that the wetting behavior of CuMnCr alloy is different from that of the other alloys due to the volatilization of Mn in the vacuum atmosphere, and with a certain Cr content the alloy has the optimal wetting behavior, i.e. the minimum contact angle at 960 ℃. The interface thickness is increased along with the amount increasing of Cr in the CuMnCr alloy. The XRD analysis indicate that the interface reaction productions between graphite and CuMnCr alloy are Mn7C3 and CrxCy, respectively.
Key words: sessile droplet; CuMnCr alloy; wetting behavior; graphite
