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Register a new userEffect Of Lubricant On Compressipility And Strength Of Green Iron Powder
تأثير المواد المزيتة على المتانة و الانضغاطية للعينات الخضراء المصنعة بالمساحيق الحديدية
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يمكن أن يؤثر نوع و نسبة المادة المزيتة بشكل كبير على خصائص المساحيق. و في هذا البحث تم دراسة تأثير نسبة و نوع المواد المزيتة على العينات الخضراء المصنعة من المساحيق الحديدية. حيث تمت إضافة نسب و أنواع مختلفة من المواد المزيتة إلى مسحوق الحديد ، و خلط المسحوق و كبسها عند درجة الحرارة العادية ، V مع المادة المزيتة لمدة ساعة في خلاط على شكل حرف إلى كثافات مختلفة %( 75,80,85 ) من الكثافة النظرية للحديد و تم استخدام ثلاث مواد مزيتة هي استيرات الزنك و الغرافيت و بولي فينيل الكحول عند ثلاث نسب ( 0.5,1,1.5 ) % ، و دراسة تأثيرها على كل من المتانة و الانضغاطية لهذه العينات.
Lubricant type and concentration play a very important role on metalic powder characterestics. This research presents the outcomes of an experimental investigation on the effect of lubricant type and content to the green compressibility, and strength of green pieces produced by adding different amounts (0.5,1,1.5)% and different types (zinc stearate,graphit,poley phinil alcohol) of lubricant to the iron powder, and mixing them for one hour in V shape blender ,then pressing them to different densities (75,80,85)% out of the the theoretica density.
References used
p.ramakrishnan (1983) :”history of powder metalurgy”,indian journal of history of sience, indian of metalurgical engeniring,indian institute of technology 19/1/1980
author W. Brian James, year 2015 title Powder Metallurgy Methods and Applications
ASM Handbook, Volume 7, Powder Metallurgy
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In this research, It has been studied the effect of compaction pressure on
the final roughness for the top and down surfaces for the green compacts
that manufactured by meal powder technique and it has been studied also
the effect of piston veloci
ty (compaction velocity) on the final roughness
for the same two surfaces.
The results present that the curved for the top surface roughness is
completely decreasing and as the pressure has increased, the value for
roughness has reduced and the mean roughness (Ra) has very close
values, where these values have made curve from second degree and
opposite relationship. The results were same for the down surfaces but
with different variations.
The changes in green peas, processed by using freezing and bleaching were
compared with their chemical composition (moisture, ash, sugar, fat). Effect of
freezing and bleaching processes of green peas on the ascorbic acid, total
phenolic compounds
,and antioxidant activity were investigated. Significant
changes were occurred between fresh and processed peas with regard to their
content of ascorbic acid, total phenols, and antioxidant activity as measured by
DPPH. Vitamin C content reduced to 65% in frozen peas and to16% in
bleaching peas. The decreased in total phenols was less, being 150mg/100g fw in
fresh peas reduced to 140 mg/100g fw in bleaching peas, and reached 120mg
/100g fw in freeze peas. These changes have been reflected significantly
(P<0.05) in antioxidant activities. Storage of green peas, frozen or boiled peas,
for 8 weeks, resulted in significant loss in vit C, antioxidant activity(P<0.05).
The research was conducted during the growing season in 2013-
2014 in Bssiren Hama. In a split- plot design: the varieties were
main plots (asgro, rama, Muncipal) and the sowing dates were subplots (15\11;30\11;15\12 and 30\12) and the densities we
re subplots (20 plant\m2, 13.33 plant\m2). The early planting went to Significant increase in the days to germination, long time of fruit; the number of days to flowering and the number of days to fruiting; Plant height; Number of branches plant ; weight of pod; number of pods plant; dressing percentage; Yield of green pods plant and
Yield of green pods. While the high density was observed
Significant increase in the Plant height; Number of branches plant;
weight of pod; number of pods plant; and Yield of green pods
plant, while the low density was observed Significant increase in the Yield of green pods. The Asgro variety was obtained at Rama and Muncipal varieties in the number of branches plant; number of pods; Yield of green pods plant and, while the Rama variety was obtained by the plant height, and non- significant results were found among varieties by the weight of pod. The positive results also showed in the interaction among factors.
Sustainability and health care building are two important issues,
which contain many of topics are very in composition,
Sustainability is a thought aimed at achieving compatibility
between human needs and the data of surrounding environment and
w
ell-employed, taking into account the constants, geographic,
climatic , economic and technological development, while we find
that under the technological age and globalization the Common
design for hospital has focused on the functional aspect, which
deals entirely with the hospital as a place to treat only, which
creating problem of the discrepancy between the functional
treatment design which requires strictly control in the internal
environment in many of hospital spaces such as operating rooms.
etc. while patient rooms need environmental conditions more
humane and interaction with the external environment ,from this
mix came the idea of green hospitals , which aims to Integrate the
idea of therapy and healing at the same time within the new
hospital installation .
This study aims to clarify the ability of Syrian companies to improve their
performance through adoption of green accounting as a marketing concept and its impact
on market share.
The study focused on the components and obstacles of environmental
knowledge for
application of green accounting and its impact on the marketing performance of the
company.
The researcher used the descriptive approach in the research community (Banias Oil
Refining Company), using a survey that has been distributed amongst workers in the
company, then the researcher analyzed the survey results by the Statistical Package for the
Social Sciences (SPSS).
The research concluded the following findings: Environmental knowledge among
workers is not at the required level, and this is what hampers the application of green
accounting in the academic concept Basically, in addition to having a lot of obstacles that
have limited the success in the application of green accounting and that reflected in turn on
the marketing performance of the company.
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