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LOCALIZED CORROSION OF MICROCRYSTALS OF 1Crl8Ni9Ti STAINLESS STEEL

LIU Dacheng CAO Chunan WANG Fuhui LOU Hanyi ZHA NG Lixin Institute of Corrosion and Protection of Metals , Academia Sinica , Shenyang , China[Originally published in ACTA METALL SIN (CHINESE EDN) 24 (5) 1988 pp B369—B371 , received 28 September 1987 , in revised form 16 December 1987]

金属学报(英文版)

The resistances against localized corrosion of 1Cr18Ni9Ti microcrystals with normal grain size and bcc structure obtained hy magnetron sputtering have been compared.The two kinds of microcrystals with (110) and (211) textures respectively were obtained under different sputtering conditions.Both microcrystals were found to have better resistance against local- ized corrosion than the crystal with normal grain.The microcrystal with (110) preferred orientation has larger resistance to localized corrosion than that with (211) preferred orientation.

关键词: microcrystal , null , null

溅射Ni_3Al微晶涂层的抗氧化性能

王福会 , 楼翰一 , 朱圣龙 , 吴维(山文)

材料研究学报

研究了铸态Ni_3Al 合金及其微晶溅射涂层在1000—1100℃下等温氧化性能及1000℃下的循环氧化性能。结果表明:铸态Ni_3Al 合金在氧化过程中形成Al_2O_3,NiO 和NiAl_2O_4 的复杂氧化膜;微晶Ni_3Al涂层在氧化过程中形成α—Al_2O_3和NiAl_2O_4尖晶石,不含NiO,这种氧化膜的保护作用比含NiO 的氧化膜的保护作用好,使得其氧化增重比铸态合金小约1半。此外铸态Ni_3Al 合金在氧化过程中沿粗大晶界发生严重的内氧化,且表面氧化膜较脆易发生剥落;微晶Ni_3Al 涂层可以消除沿晶界的内氧化,氧化膜与基体粘附良好,未发现剥落现象。微晶化大大提高了Ni_3Al 合金的抗氧化性能。

关键词: Ni_3Al , microcrystal , oxidation

钢的离子氮化表层中的α相微晶结构

李冀 , 苑永生 , 苑珂琦

金属学报

对W18Cr4V,38CrMoAl,1Cr18Ni9Ti3钢种的离子氮化层进行了透射电镜观察,并对奥氏体不锈钢的离子氮化表层用Auger能谱进行了成分分析,由于离子轰击效应,在离子氮化表层形成了α相微晶结构,其中存在织构.在离子轰击渗扩过程中,1Cr18Ni9Ti奥氏体不锈钢的渗层的表层发生成分变化,Cr/Fe比升高,Ni/Fe比下降,所以也形成了α相微晶结构。

关键词: 离子氮化 , microcrystal , surface structure

模板剂对Sm2O3微晶的生长及光学性能的影响

殷立雄 , 王丹 , 黄剑锋 , 郝巍 , 陶晓文 , 吴建鹏

功能材料 doi:10.3969/j.issn.1001-9731.2013.16.015

以SmCl3·6H2O和NaOH为主要原料,异丙醇为溶剂,借助不同模板剂对Sm2O3微晶进行可控合成.在200℃溶剂热条件下反应48h后得到前驱体,经800℃热处理1h后制得了不同结构和形貌的Sm2O3微晶.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和Lambda 950分光光度计分别对产物的物相、形貌和光学性能进行表征,并研究了不同模板剂对产物的物相、形貌及光学性能的影响.结果表明,不同模板剂对产物的结构、尺寸及性能产生不同的影响.以CTAB作为模板剂时,制备了含有立方相和单斜相两相的、六方片状结构的Srm2O3微晶,其禁带宽度为4.828eV.

关键词: 溶剂热 , Sm2O3 , 微晶 , 模板剂

ALPHA-PHASE MICROCRYSTALLINE STRUCTURE OF IONITRIDING LAYER ON STEELS

LI Ji YUAN Yongsheng Northeast University of Technology , Shenyang , ChinaYUAN Keqi University of Science and Technology Beijing , Beijing , China

金属学报(英文版)

TEM observation on the ionitriding layer was carried out on steels W18Cr4V,38CrMoAl and 1Cr18Ni9Ti,and AES of elementary analysis was also made on the outer surface of ionitrid- ing layer of austenitic stainless steel.Perhaps due to the ion-bombardment effect,a microcrystalline structure with texture was affirmed along surface of the ionitriding layer.It may be affected by cathodic sputtering and absorption that the atomic ratio of Cr/Fe in- creases and of Ni/Fe decreases on surface of nitriding layer on austenitic stainless steel 1Cr18Ni9Ti,thus the α-phase microcrystalline structure occurrs.

关键词: ionitriding , null , null

1Cr18Ni9Ti不锈钢微晶的耐局部腐蚀性能研究

刘大成 , 曹楚南 , 王福会 , 楼翰一 , 张立新

金属学报

利用磁控离子溅射技术得到bcc结构的1Cr18Ni9Ti不锈钢微晶溅射层,在不同溅射条件下可以得到(110)和(211)两种择优取向的微晶。用电化学方法研究表明,这两种微晶的耐局部腐蚀性能都较正常晶粒有明显提高,且(110)择优取向微晶的耐局部腐蚀性能较(211)择优取向微晶的耐局部腐蚀性能更好。

关键词: 微晶 , localized corrosion , magnetron sputtering

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