Mineralogical characteristics and the gem quality of corundum in Khe tre area, Eakar, Daklak

Corundum in Khe Tre area essentially distributes in pegmatite bodies that intruded the granite of Ea Dui complex ((P-Ted) and metamorphic rocks of Ea Rock formation (PR2er). Corundum mainly developed within pegmatite bodies and in contact metasomatic endozone between pegmatite and granite or gneiss. Mineralogical composition of pegmatite is as follows; Major minerals: alkali feldspar (orthoclas, microlin) 60 -70 %, quartz ~ 15 %; Minor minerals: plagioclase, biotite, muscovite Accessory minerals: garnet, zircon, sphene, apatite,...The corundum here was found in intergrowth with feldspar and characterized by dark to dark blue (very rare) hue, opaque diaphaneity, subhedral to anheral crystals and few mineral inclusions. The size of corundum crystals varies from about 2 cm to 5 cm. Rough corundum crystals are rarely of gem value. Most of them can be used only as abrasibve material. For improvement of corundum to be used as gemstones, heat treatment method was proposed.

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Exposure Time of Vapor Heat Treatment Method Following Waxing to Maintain Fruit Quality of Papaya During Storage

Jurnal Keteknikan Pertanian ◽

10.19028/jtep.22.1.41-46 ◽

2008 ◽

Vol 22 (1) ◽

pp. 41-46

Author(s):

Rokhani Hasbullah ◽

◽

Elpodesy Marlisa ◽

Ali Parjito ◽

Edy Hartulistiyoso ◽

...

Keyword(s):

Heat Treatment ◽

Exposure Time ◽

Fruit Quality ◽

Treatment Method ◽

Heat Treatment Method

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Analysis of Heat Treatment Quality of a Spring Clip with Failure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.395-396.887 ◽

2013 ◽

Vol 395-396 ◽

pp. 887-890

Author(s):

Mei Hua Zhu ◽

Jia Wei Lu ◽

Ying Xi ◽

Jin Sen Zhang ◽

Zhe Chen

Keyword(s):

Heat Treatment ◽

Surface Quality ◽

Fatigue Fracture ◽

Treatment Method ◽

Treatment Quality ◽

Micro Hardness ◽

Metallographic Structure ◽

Strength And Durability ◽

Heat Treatment Method

The fastening is an important part for fastening when laying the rails, which requires sufficient fastening pressure, strength, and durability. This article focuses on the fatigue fracture of the spring clip of a fastening and gets a result that the fracture accounts for alternating twist-bend load by examining macro-fracture. The crack origin is on the surface of the clip where significant decarburization and corrosion exists and its extension makes the clip break by examining metallographic structure and testing micro-hardness. The solution is to improve the heat treatment method and the surface quality avoiding corrosion.

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Effect of Heat Treatment by the Sous-Vide Method on the Quality of Poultry Meat

Foods ◽

10.3390/foods10071610 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1610

Author(s):

Wiesław Przybylski ◽

Danuta Jaworska ◽

Katarzyna Kajak-Siemaszko ◽

Piotr Sałek ◽

Kacper Pakuła

Keyword(s):

Heat Treatment ◽

Sensory Quality ◽

Treatment Method ◽

Poultry Meat ◽

Chicken Breast ◽

Breast Meat ◽

Sous Vide ◽

The Impact ◽

Cooked Meat

An increase in the consumption of poultry meat has been observed due to its availability, nutritional value, and delicate flavor. These characteristics make it possible to prepare, with the use of spices and other additives, many different dishes and products for increasingly demanding consumers. The sous-vide technique is increasingly being used to give new sensory attributes to dishes in gastronomy. The study aimed to assess the impact of the heat treatment method, i.e., the sous-vide method, as compared to traditional cooking, on the sensory quality of poultry meat, as well as the efficiency of the process with regard to technological quality. The cooking yield with the sous-vide method of processing poultry meat was higher than with the traditional method of cooking in water (88.5% vs. 71.0%, respectively). The meat was also found to be redder (a* = 254 vs. 074) and less yellow (b* = 1512 vs. 1649), as well as more tender. The sensory quality of chicken breast meat obtained by the sous-vide method was higher in terms of attributes such as color tone, tenderness, juiciness, and overall quality. At the same time, it was lower in terms of the odor of cooked meat and the flavor of cooked meat as compared to meat subjected to traditional cooking.

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The primary-auxiliary local post-welding heat treatment method to control welding residual stresses for pressure vessels

International Journal of Pressure Vessels and Piping ◽

10.1016/j.ijpvp.2021.104431 ◽

2021 ◽

pp. 104431

Author(s):

Qiang Jin ◽

Wenchun Jiang ◽

Wenbin Gu ◽

Jinguang Wang ◽

Gang Li ◽

...

Keyword(s):

Heat Treatment ◽

Residual Stresses ◽

Treatment Method ◽

Pressure Vessels ◽

Heat Treatment Method

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Modified-edge-support heat treatment method of polyimide for crystalline, large-area, and self-standing ultrathin graphite films

Carbon ◽

10.1016/j.carbon.2021.05.036 ◽

2021 ◽

Author(s):

Kensuke Murashima ◽

Yuki Kawashima ◽

Shuhei Ozaki ◽

Atsushi Tatami ◽

Masamitsu Tachibana ◽

...

Keyword(s):

Heat Treatment ◽

Treatment Method ◽

Large Area ◽

Heat Treatment Method

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A Study of the Influence of Local Heat Treatment on the Structure of Welded Titanium Pipelines

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.410.37 ◽

2021 ◽

Vol 410 ◽

pp. 37-41

Author(s):

Natalia A. Astafeva ◽

Andrey A. Balanovskiy ◽

Anna A. Pershina

Keyword(s):

Heat Treatment ◽

Residual Stresses ◽

Titanium Alloys ◽

Welded Joints ◽

Treatment Method ◽

Local Heat ◽

Optical Metallography ◽

Heat Treated ◽

Weld Structure ◽

Heat Treatment Method

The article analyzes the results of a study of the influence of zonal heat treatment on the structure of welded joints of pipeline elements made of titanium alloys Ti-3.5Al-1.5Mn. In the manufacture of such structures, the TIG welding method is used to join pipe elements, after which the heat treatment method can be used to relieve residual stresses. The experiments have confirmed the effectiveness of zonal heat treatment preceded by welding. It was revealed that for welded joints made of titanium alloys, heat treatment can stabilize the structure. In experiments conducted by the method of optical metallography, the structure of heat treated and untreated welded joints was investigated. The influence of heat treatment on the weld structure and heat-affected zone was identified.

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