丁高明
,
卢树东
,
刘国荣
,
肖淳
黄金
doi:10.11792/hj20160904
朱林西金矿床位于金山金矿田的中北部,是与韧-脆性剪切带有关的石英脉型、蚀变岩型金矿床。在综合研究和利用矿区以往地质地球化学资料基础上,选取矿区40号勘探线为典型地质剖面,对该剖面坑探工程控制的Ⅰ号金矿带进行系统采样和数据分析与统计计算。利用相关分析、聚类分析、因子分析方法,确定了金矿床的原生晕组合特征。通过绘制和分析原生晕元素轴向异常分布图和叠加图、地球化学参数计算图,初步归纳了矿床构造叠加晕总体特征,并分析了矿体原生晕特征的地质意义以及对深部盲矿体预测的应用。研究认为:As与 Au关系密切, As、Sb和Hg为金矿体的前缘指示元素组合;Pb、Zn、Cu分布于矿体周围,为矿体的近矿晕指示元素组合;Mo、Mn和Co元素为矿体的尾晕元素组合;尾晕的反带异常、前缘晕与尾晕叠加等特征对深部盲矿体预测有重要指示作用。
关键词:
原生晕
,
朱林西金矿床
,
金山金矿田
,
盲矿体预测
冯震宙
,
王新军
,
王富生
,
高行山
,
岳珠峰
材料科学与工程学报
doi:10.3969/j.issn.1673-2812.2007.02.027
LS-DYNA可以满足用户对某些材料本构关系子程序开发的要求.本文首先编制了各向同性线弹性材料本构模型子程序,计算单轴拉伸作用,得到材料子程序开发的可行性;另外主要编制了飞机风挡材料采用的具有应变率效应的非线性粘弹性朱-王-唐本构模型,结果能很好地对朱-王-唐模型进行描述,特别是应变率对该模型的影响.并用于真实风挡的计算,得到的数值结果与试验值比较吻合.
关键词:
非线性粘弹性本构关系
,
材料子程序
,
风挡
,
应变率
朱立群
腐蚀学报(英文)
电沉积非晶态Fe-Mo合金复合镀研究朱立群(北京航空航天大学材料系、北京100083)获中国腐蚀与防护学会第三届全国青年腐蚀科技论文讲评会优秀奖朱立群,男,1955年8月生,原籍山东菏泽市,现为北京航空航天大学金属腐蚀与防护专业副教授.主要从事金属防护原理等教学工作,科研涉及耐蚀性涂层,高强钢应力腐蚀与红脆等,已发表论文对篇.获航空航天部科技进步二等奖.oj年被航空航天部评为”做出突出成绩的中国硕土学位获得者”光荣称号.电....
关键词:
王磊
,
杜军
,
毛昌辉
材料导报
研究了低氧分压反应溅射法生长的SnO2薄膜于600℃ O2气氛和Ar气氛退火处理后的表面形貌、晶体结构以及表面成分,发现经氧化性气氛退火处理的SnO2为具有金红石结构的表面多孔薄膜.相比较而言,Ar气氛退火处理后的SnO2薄膜表面较为致密,相结构包含朱氧化完全的β-Sn.XPS分析进一步表明,氧化性气氛退火形成单一组分的SnO2,而惰性气氛退火后薄膜表面含有Sn、SnO和SnO2.另外,研究还发现薄膜表面吸附氧形态与退火气氛有关.
关键词:
二氧化锡
,
薄膜
,
反应磁控溅射
,
退火气氛
孙述利
,
张敏刚
,
何文武
稀有金属材料与工程
通过热压缩试验研究9Cr-2W 耐热合金在1000~1300℃和应变速率0.005~0.5 s-1范围内的流变行为和热变形组织演变,并对热镦粗试样做了织构测定.分析该合金在实验参数范围内热变形的应力-应变特征,动力学方程,获得应力指数和变形激活能等表征其变形能力的重要特征参数.组织观察和织构测试结果表明,9Cr-2W耐热合金热变形过程中组织演变机制以动态回复和几何动态再结晶方式进行.在实际生产中,可以选择较高的变形温度朱降低流变应力和改善各向异性.
关键词:
9Cr-2W耐热合金
,
热变形特性
,
动态再结晶
,
变形织构
Journal of Solid State Chemistry
The BaB2O4-BaF2-2NaF-NaB2O4 reciprocal system has been investigated by combination of experimental measurements with theoretical calculation. The Na2B2O4-2NaF binary and Na2B2O4-BaF2 pseudo-binary phase diagrams are measured by means of DTA and X-ray diffraction. The thermodynamic functions for all sub-binary systems are derived from measured phase diagrams and thermodynamic data by CAL-PHAD technique, and the sub-binary phase diagrams are calculated according to phase equilibrium principle. Then, the thermodynamic functions for sub-binary systems are extrapolated to the BaB2O4-BaF2-2NaF-Na2B2O4 reciprocal system, and the phase diagram of the reciprocal system is calculated. The calculated phase diagrams are verified by additional experiments. (C) 1996 Academic Press, Inc.
关键词:
phase-equilibrium;beta-bab2o4;crystal
XU Qiang
,
LEI Changhui (BeiJing Laboratory of Electron Microscopy. Chinese Academy of Sciences
,
P. O. Box 2724.100080 )Beijing
,
China.ZHANG Yonggang (Department of Materials Science and Engineering
,
BeiJing University of Aeronautics and Astronautics
,
100083 Beijing
,
China.)
金属学报(英文版)
A Ti-45at.%Al alloy which was solution-treated at 1350℃ for 30 minutes and quenched in water is employed to explore mechanisms of α_2→γphase transformation. The ageing process of the quenched alloy has been in situ studied it has been found that the γ lamellae can precipitate in the α_2 matrix by two mechanisms. When The alloy is aged at 700℃, the stacking faults pre-existing in the α_2 matrix start to grow and more are generated.With the increase of ageing time and ageing temperature the density of stacking faults is increased and the γ lamellae then precipitate. This isα diffusion-controlled process. Alternatively, the γ lamellae may be formed from the α_2 matrix by 1/3(1100) shearing on the (0001) plane. The latter mechanism implies that the strain-induced transformation may occur, which is confirmed by deformation of the quenched alloy.
关键词:
: TiAl
,
null
,
null