TiB2 Powder Production for Engineered Ceramics

Kim, Jonathan J.; McMurtry, C.H.

doi:10.1002/9780470320297.ch14

Cited by 20 publications

(7 citation statements)

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“…While exhibiting excellent control of reaction dynamics, the carbothermic and borothermic reduction pathways are energy intensive. They are kinetically favorable above 2000° and 1200°C, respectively 8,9 . The magnesium SHS method to synthesize TiB 2 is a fast, low‐energy alternative.…”

Section: Introductionmentioning

confidence: 99%

Acid Leaching of SHS Produced Magnesium Oxide/Titanium Diboride

Lok

Logan

Payyapilly

2009

Journal of the American Ceramic Society

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The stoichiometric self-propagating high-temperature synthesis (SHS) thermite reaction involving magnesium (Mg), titanium dioxide (TiO 2 ), and boron oxide (B 2 O 3 ) forms MgO and titanium diboride (TiB 2 ) as final products. Selective acid leaching is used to remove the MgO leaving TiB 2 powder. This study investigates the acid leaching of SHS-produced MgO/TiB 2 powders and a stoichiometric mixture of commercially obtained MgO and TiB 2 powders. Leaching was conducted at pH levels of 4.0, 2.5, and 1.0 by the introduction of concentrated aliquots of HNO 3 . This method maintains a minimum pH target throughout the leaching process, thereby sustaining a dynamic concentration to remove the oxide. The optimal leaching conditions were determined to be at 901C at a minimum pH target of 2.5 for the SHS-produced product. At these conditions, conversion percentages of 83%-84% of MgO were measured with only trace amounts of TiB 2 measured in the solution (o100 lg/L). Conversion percentages for each leaching condition and dissolution mass of solid MgO and TiB 2 at each pH are also reported. Results from powder X-ray diffraction confirm the removal of MgO and minimal dissolution of TiB 2 , and indicate the formation of unidentified compounds. Inductively coupled plasma mass spectrometry (ICP) was used to analyze the ionic composition and extent of leaching. Scanning electron microscopy was used to observe the particle morphology of the leached powders.

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Section: Introductionmentioning

confidence: 99%

Acid Leaching of SHS Produced Magnesium Oxide/Titanium Diboride

Lok

Logan

Payyapilly

2009

Journal of the American Ceramic Society

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“…Tepkimeye göre daha az sıcaklık ve enerji gerektirir [16]. Genellikle tepkime (2), TiB 2 üretiminde daha çok tercih edilen reaksiyondur [15,28].…”

Section: Karbotermal Yöntem Ile üRetimi (Production By Carbotermal Meunclassified

Üstün Özelli̇klere Sahi̇p İleri̇ Teknoloji̇ Serami̇ği̇: Ti̇tanyum Di̇borür

Akkurt¹

2019

Journal of Boron

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Humanity has been communed with nature since the beginning of its existence and has invented various instruments by imitating the nature. The most effective factor in the development of these inventions was material science. The importance of the material science has increased with the developing technologies in recent years, and it has become mandatory to find new materials. Ceramic materials have always been of great importance for human. Advanced technology ceramics are used in many commercial applications due to their long life, high performance, superior properties and cost-effectiveness. Titanium diboride (TiB 2 ) with its hardness, high melting point, excellent abrasion and corrosion resistance has a very important place among advanced technology ceramics. There are a wide range of applications such as the production of wear-resistant parts, aluminum electrolysis, protective film layers, military applications (armor), etc. In this article, the physical and chemical properties, production methods, usage areas and the studies carried out in recent years of titanium diboride (TiB 2 ), which has a very important place among the advanced technology ceramics, are briefly presented.

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“…Reaction through B4 C is the preferred method of manufacture because of the processing difficulties generally encountered with the presence of low melting B 2 0 3 (Kim and McMurtry, 1985). Reaction through B4 C is the preferred method of manufacture because of the processing difficulties generally encountered with the presence of low melting B 2 0 3 (Kim and McMurtry, 1985).…”

Section: Thermochemistrymentioning

confidence: 99%

“…The TiB2 pusher furnace described by Kim and McMurtry (1985) was reported to be near its maximum scale of effective operation. The TiB2 pusher furnace described by Kim and McMurtry (1985) was reported to be near its maximum scale of effective operation.…”

Section: Disadvantages Of Pusher Furnace Synthesis Processesmentioning

confidence: 99%