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Metalurgia INTERNATIONAL (magazine set-up
in 1995) English version,
published by romanian metallurgical
foundation Honorary president
of scientific
publishing house f.m.r. Dr. ec. Lepădatu v. gheorghe
(2006)
no.7 romanian metallurgical
foundation Scientific publishing
house |
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Honourary
Staff (in alphabetical order) bensabra
hakim (algeria), chabour
salem (algeria), gencang yang
(china), R. S.
HOUK (S.U.A.), I. IMRI (TECHNICAL
UNIVERSITY OF KOICE,
SLOVAK REPUBLIC), pușici miho (Slovenia), roșescu gheorghe
(grecia), roxana ruxandra
(california), w.m. nicola
(tri. state university angola, indiana, s.u.a.), xianqing you (china) |
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editorial
board : Prof. colan horia Ph. D., member of Romanian Academy of
Technical Sciences Prof. Coșmeleață georgeta Ph. D. Prof.
Dumitrescu Constantin Ph. D., deputy member of
Romanian Academy of Technical Science Prof. French David Ph. D., CSIRO Energy Technology, Australia Prof. Gălușcă Dan-Gelu Ph. D. Prof.
Mihaela Grigore Ph. D., University of New
South Wales, Sydney, Australia Prof. Lawson Cristopher Ph. D., Copenhague Technical Institute, Denmark Prof. Nicolae Avram Ph. D. Prof. Maria Nicolae Ph. D. Prof.
doc. Oprea Florea Ph. D., member of Romanian
Academy of Technical Sciences Prof.
Veena Sahajwalla Ph. D., University of New South Wales, Sydney, Australia Prof. Sakurovs Richard Ph. D.,
CSIRO Energy Technology, Australia Prof. Salvo Luc Ph. D., Grenoble National Politechnical
Institute, France Prof. Saiter Jean-Marc Ph. D., Rouen University, France Prof. Scorțea Costin Ph. D. Prof. Simiti Ioan Vida Ph. D. Prof.
Sofroni Laurenție Ph. D., member of
Romanian Academy of Technical Sciences Prof. Șaban Rami Ph. D Prof. ȘTEFĂNESCU DORU Ph. D, Ohio State University Columbus, S.U.A. advisory board : Prof. bejan Mircea Ph. D Prof. cănănău nicolae Ph. D Prof. hepuț teodor Ph. D Prof. TODERIȚA
NEMEȘ Ph. D Prof. Doina Răducanu Ph. D Prof. Ripoșan Iulian Ph. D Prof. samoilă Corneliu
Ph. D Prof. SOFONEA GALAgTION
Ph. D Managing Director: Editor-in-chief: Professor Scorțea
Costin Ph. D. Manager Scientific Publishing House F.M.R.: eng. Florentina
Brândușa Scorțea |
Contents Issn 1582 2214 Rodica-Mariana Ion, OLIVEIRA A. S., FERREIRA
Vieira L. F.: New hibrid materials (microcrystalline cellulose
porphyrin/phthalocyanine) for water depollution
...
. 5 GEAMĂN Virgil, JIMAN Vasile:
Evaluation of densification mechanism during
plastic yielding and diffusion by hot isostatic
pressing
..... 13 CALEA G. Gheorghe, GHIMIȘ D., PAUN C., PAUN S., NICOLAE Avram:
Studies regarding the increase of the availability of some components of the machines by using the functional ceramic coating
.
.. 16 Ciobanu Ioan, Monescu Vlad, Mașniță Mihai: A study regarding the influence of the pouring temperature over a casting solidification from an eutectic grey cast iron
... 21 GHIMBĂȘEANU Ioan:
Statical analysis of a test-tube
... 28 BATALU Dan, Georgeta Coșmeleață, ALOMAN Angel, ZHIHUA Zhang:
Critical analysis of some Experimental Ti-Ni phase diagrams. Short review
...
32 Elena Drăgulănescu: About management for design
... 40 ? FOSECO
Turbostop system reference list
I-II ? Press
release
..
..
........... III
VI ? New books,
published by romanian metallurgical
foundation
.
..
..... VII - VIII |
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abstract
metalurgia International 7/2006
|
D.C.: 669.2/.8 Key words: porphyrins, microcrystalline cellulose,
o-nitrophenol, photodegradation Rodica-Mariana Ion, OLIVEIRA A. S., FERREIRA
Vieira L. F.: New hibrid
materials (microcrystalline cellulose porphyrin/phthalocyanine) for water
depollution Metalurgia International (vol. XI), no.7, 2006, p.
5 The
photochemical degradation processes are generally based on oxidative
reactions initiated by very reactive radicals, such as OH.
radicals. However, there are a number of refractory substances (nitrophenols
being one of them) that degrades very slowly under these conditions. The heterogeneous
photocatalysts seems to be one of the most efficient ways to destroy aquatic
phenolic pollutants. In this paper were developed new types of heterogeneous photocatalysts
that destroy and detoxifies waste water streams containing up to 300 ppm of 2
- nitrophenol pollutants. The adsorption of zinc-complexes of 5,10,15,20 - p
- sulphonato - phenyl - porphyrin (ZnTSPP)
and 4,8,18,22 - tetra - sulphonato -
phthalocyanine (ZnTSPc) on microcrystalline cellulose occurs after
swelling the matrix with a polar protic solvent, by entrapment of the probes
within the polymer chains, for low loadings, and in pools of microcrystals,
for high loadings. The adsorbed compounds were characterised by ground-state
diffuse reflectance technique (GSDR). These adsorbed complexes have also been
studied as catalysts for o-nitrophenol photochemical degradation in aqueous
solution. By adsorption on microcrystalline
cellulose the degree of photodestruction of such
complexes of ZnTSPP and ZnTSPc is smaller in comparison to that in
homogeneous phase due to a longer diffusion time toward the photoactive
molecules. D.C.: 669.2 Key words: HIP, compression
mechanism, full density GEAMĂN Virgil, JIMAN Vasile: Evaluation
of densification mechanism during plastic yielding and diffusion by hot
isostatic pressing Metalurgia International (vol. XI), no.7, 2006, p.
13 Hot isostatic processing
(HIP), involves the simultaneous application of pressure and elevated
temperature to materials. Under these conditions of heat and pressure,
internal pores or defects within a solid body or a powder compact collapse
and weld up. HIP is today used for a lot of applications, like upgrading
castings (removing shrinkage pores in interdendritic space), densifying
pre-sintered components, consolidation of powders and interfacial bonding. The main densification mechanisms
during hot isostatic
pressing are: plastic yielding,
power law creep, densification by diffusion and Nabarro-Herring and Coble
creep. The paper presents some
theoretical data for calculating densification mechanisms during plastic
yielding and diffusion. D.C.: 574 CALEA G. Gheorghe, GHIMIȘ
D., PAUN C., PAUN S., NICOLAE Avram: Studies
regarding the increase of the availability of some components of the machines
by using the functional ceramic coating Metalurgia International (vol. XI), no.7, 2006, p.
16 This paper presents the
ceramic (Al2O3) coating technology (Al2O3)
under plasma jet applied to spindles used in construction systems. D.C.: 621.746.628 Ciobanu Ioan, Monescu
Vlad, Mașniță Mihai: A study regarding the influence of the pouring
temperature over a casting solidification from an eutectic grey cast iron Metalurgia International (vol. XI), no.7, 2006, p.
21 This paper presents the
results of a research made by the authors regarding the influence of the
pouring temperature over solidification kinetics. It was used a 2D
mathematical model for the |
solidification simulation. It was analysed a cast
bar with section 20 x 150mm poured from an eutectic grey cast iron. The
overheat at pouring above liquidus temperature was between 0 ˚C and 250
˚C. We did some observation regarding the overheat influence over the
solidification time and temperature field from casting and from the mould. D.C.: 621.315.592 GHIMBĂȘEANU Ioan: Statical analysis
of a test-tube Metalurgia International (vol. XI), no.7, 2006, p.
28 The
paper presents the algorithm of finite element analysis of the steel test
tube tensile test in order to determine the usual mechanical characteristics
assisted by the computer. This finite element analysis of a test tube tensile
test is made through CATIA graphic programme. D.C.: 620.193. Key
words:
Ti-Ni binary phase diagram, critical analysis, shape memory alloy BATALU
Dan, Georgeta Coșmeleață, ALOMAN Angel, Metalurgia International (vol. XI), no.7, 2006, p.
32 TiNi
shape memory alloys have a wide area of applications in various fields. The
alloys are used in the medical engineering for producing smart devices, such
as stents or self fixing implants, dental implants etc. The authors analysed three of the most
cited binary Ti-Ni phase diagrams and two partial phase diagrams that concern
the homogeneity domain of TiNi compound. Ti-Ni binary phase
diagram is one of the most important diagrams of Ti based binary alloys, such
as Ti-Al and Ti-Fe. The importance of Ti-Ni phase diagram is mainly due to
the TiNi shape memory alloy with its special characteristics. In the present paper the authors suggested
a schema of the binary Ti-Ni phase diagram and established its corresponding
flow diagram. The
results are important for pointing out a reliable binary Ti-Ni phase diagram
and for indicating new directions of research of Ti-Ni alloys, in order to
clarify the related controversies. D.C.: 621.762.4; 66.046.562 Elena Drăgulănescu: About
management for design Metalurgia International (vol. XI), no.7, 2006, p.
40 In the technical field
management must be applied like a for design like a process and that process
must belong to an organization which is very good lead. This modern text is
designed to prepare you for your
future vision about management in the design for technical field. While ideas, theories,
techniques, and data are dynamic, the information contained in this work will
provide you a quick and useful reference as well as a guide for future
understanding for many years to come, about management in design. Are offered some ideas
about intelligence information, organizational communications and the
function of a decision support system. General
Principles and Functions
of Management are need for modern, technical Design. In metallurgic industry and
processing industry the knowledges about management in design, about the
principles of management serve as guides for
managers who engage in carrying out specific functions to solve
problems and make decisions. This is a very large area
of knowledges. The first step in
management in design is to develop a clear understanding of the various
information flows that must be dealt with. Software helps always this
process. Is very important to apply a decision support system and to know
about the your managerial functions of planning, organizing, leading and
controlling. |
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