Mo在水溶液中的耐腐蚀性能

综述了Mo在不同溶液中的电化学行为、电池作用腐蚀 行为，并从技术的角度总结了它在各种碱性溶液、酸性溶液、无机盐溶液以及海水中的耐蚀性能.最后对研究工作进行了展望.     

激光熔覆制备B_4C_p/Ni合金复合涂层的组织与性能

对Ni60合金粉末中添加B4C陶瓷颗粒的激光熔覆组织结构和力学性能做了研究。结果表明,加入陶瓷颗粒可增加熔覆层中强化相数量,提高涂层的硬度和耐磨性,在陶瓷颗粒加入量达到15%时效果最好。     

Li2O-MgO-Al2O3-SiO2系高温低膨胀釉的制备及性能研究

以焦炉炉门堇青石衬砖的使用情况为依据，得出适合堇青石衬砖高温低膨胀釉的体系为Li2O-MgO-Al2O3-SiO2系。釉料在合理的化学组成范围内生成堇青石与口．锂辉石固溶体晶体。试验成功的研制出适用于堇青石衬砖的高温低膨胀釉，釉料在1350℃与堇青石砖共同烧成，釉层能均匀光滑的铺展在堇青石衬砖表面，它能在1200℃下使用而不融化，它的热膨胀系数为2．85×10^-4，在20℃～1000℃并且还有待于进一步降低。釉与堇青石衬砖热膨胀相匹配，因此釉层经五次热震（1100℃，水冷）后的没有裂纹出现。XRD物相分析得出釉有堇青石与口．锂辉石固溶体晶体相生成。釉能填充堇青石衬砖表面的气孔并以自身的高致密性防止了有害物质向砖内部渗透，起保护层作用。     

高强韧性热作模具钢SDH2的研究

在高温、高压强条件TH13钢通常出现早期失效，而传统的3Cr2W8V钢却表现出韧性不足，为此通过降低Cr含量、提高Mo和V含量，添加W元素来改善热作模具钢的综合性能，设计出了SDH2钢。室温和高温冲击韧度试验、回火稳定性试验和热疲劳试验表明，1100℃淬火＋600℃回火的SDH2钢室温下冲击值大于300J；回火温度从560℃升高到625℃保温18h，SDH2钢的硬度值依然大于46HRC；另外，SDH2钢具有比H13钢更优良的抗热疲劳性能。     

Role of Al2O3 layer in oxidation resistance of Cu-Al dilute alloys pre-annealed in H2 atmospheres

Copper was alloyed with small amounts of Al (0.2, 0.5, 1.0 and 2.0 mass%) to improve the oxidation resistance. Copper (6 N) and the Cu-Al alloys were oxidized at 773-1173 K in 0.1 MPa oxygen atmosphere after hydrogen annealing at 873 K. Continuous very thin Al₂O₃ layers were formed on the surface of all Cu-Al dilute alloys during the hydrogen annealing. Oxidation resistance of Cu-Al alloys was improved especially for Cu-2.0Al at 773-973 K, while it decreases on increasing the oxidation temperature. Cu-Al alloys followed the parabolic rate law at 1173 K, but most of other cases do not at and below 1073 K. Oxidation resistance for Cu-Al alloys was found relevant to the maintenance of the thin Al₂O₃ layer at the Cu₂O/Cu-Al alloy interface.     

A comparative study of reactive direct current magnetron sputtered CrAlN and CrN coatings

Approximately 1.5 μm thick CrN and CrAlN coatings were deposited on silicon and mild steel substrates by reactive direct current (DC) magnetron sputtering. The structural and mechanical properties of the coatings were characterized using X-ray diffraction (XRD) and nanoindentation techniques, respectively. The bonding structure of the coatings was characterized by X-ray photoelectron spectroscopy (XPS). The surface morphology of the coatings was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The XRD data showed that the CrN and CrAlN coatings exhibited B1 NaCl structure. Nanoindentation measurements showed that as-deposited CrN and CrAlN coatings exhibited a hardness of 18 and 33 GPa, respectively. Results of the surface analysis of the as-deposited coatings using SEM and AFM showed a more compact and dense microstructure for CrAlN coatings. The thermal stability of the coatings was studied by heating the coatings in air from 400 to 900 °C. The structural changes as a result of heating were studied using micro-Raman spectroscopy. The Raman data revealed that CrN coatings got oxidized at 600 °C, whereas in the case of CrAlN coatings, no detectable oxides were formed even at 800 °C. After annealing up to 700 °C, the CrN coatings displayed a hardness of only about 7.5 GPa as compared to CrAlN coatings, which exhibited hardness as high as 22.5 GPa. The potentiodynamic polarization measurements in 3.5% NaCl solution indicated that the CrAlN coatings exhibited superior corrosion resistance as compared to CrN coatings.     

高耐蚀性和全光亮化学镀Ni-P合金的研究

本文对化学镀Ni-P合金的工艺参数进行研究，确定了最佳工艺条件，采用扫描电镜、电子探针、X射线衍射仪对镀层的成分和组织结构进行分析，得到Ni-P非晶态合金层。试验表明：镀层在15％H2SO4和10％HCI溶液中，具有优良的耐蚀性，其外观有较好的光亮性。     

钛合金表面加弧辉光离子无氢渗碳耐蚀性能的研究

提出一种新的钛合金表面强化方法，利用加弧辉光离子无氢渗碳技术在钛合金表面形成渗碳层。该方法是在加弧辉光离子渗镀技术中引入由高纯石墨制成冷阴极电弧石墨靶，按冷阴极场致发射机制，源源不断地从电弧石墨靶上发射出高能量、高密度、高离化率、高速度的离子流，成功的在钛合金(Ti6Al4V)基材表面形成25—30μm厚的渗碳层，同时避免了氢元素对钛合金造成的氢脆问题。电化学腐蚀试验表明钛合金无氢渗碳后耐蚀性能得到提高，在0．5mol/L的稀硫酸腐蚀介质中，耐蚀性提高7倍多。渗碳后钛合金表面显微硬度达到936(HV)。其中，渗碳层相结构采用XRD进行检测。     

变质处理高速钢导辊的研究

通过调整高速钢成分和采用RE—K—Na复合变质处理；改变了共晶碳化物的形态和分布，使铸造高速钢冲击韧度提高69．9％，热疲劳抗力也明显改善。变质处理高速钢导辊使用中不粘钢、不破碎、不剥落，使用寿命比高镍铬合金铸钢和Crl2MoV锻钢导辊提高2—3倍。     

Corrosion resistance of austenitic stainless steel separator for molten carbonate fuel cell

STS310S and SC-STS310S (simultaneously co-deposited chromium and aluminum onto 310S austenitic stainless steel substrate by pack-cementation process) were used as separator materials on the cathode side of a molten carbonate fuel cell. With the STS310S, corrosion proceeded via three steps; a formation step of unstable corrosion product, a protection step against corrosion until breakaway, and an advance step of corrosion after breakaway. The final corrosion product was LiFeO₂ and the loss of mass was 6.5 mg/cm² after a corrosion test of 480 hr at 650°C. The SC-STS310S showed more effective corrosion resistance, however, than did common STS310S. There was especially no corrosion loss on the SC-STS310S after the 480 hr corrosion test. It is anticipated that it will be very useful as an alternative separator on the cathode side off the MCFC in the future.