Purifying effects and product microstructure in the formation of TiC powder by the self-propagating high-temperature synthesis

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Metallurgical Transactions, B (Process Metallurgy); (United States)

DOI:https://doi.org/10.1007/BF02648990· OSTI ID:6545760

Chang, D K ^[1]; Won, C W; Chun, B S ^[2]; Shim, G C ^[3]

---

1. Korea Inst. of Energy and Resources, Daejeon (Korea, Republic of)
2. Chungnam National Univ., Daejeon (Korea, Republic of)
3. Korea Inst. of Geology, Mining and Materials, Daejeon (Korea, Republic of)

In self-propagating high-temperature synthesis (SHS), the exothermic heats of reaction usually involving solid reactants are sufficient for the process to sustain itself once the reactant mixture is ignited. Much research has been done on the application of SHS for the synthesis of many high-temperature materials. Advantages of SHS include the simplicity of apparatus as well as the absence of the need for external heating other than the small amount of heat for ignition. furthermore, due to the fact that the SHS process typically takes place above 2,000 C, many of the impurities volatilize, often yielding a product containing less impurities than in the reactant mixture. Among the numerous materials synthesized by SHS, TiC has attracted much attention because of its superior high-temperature resistance and strength, hardness, and wear resistance. Conventional TiC production methods such as the carbothermic reduction of titanium dioxide, the titanium hydride process, and chemical vapor deposition suffer from the shortcomings of high oxygen or hydrogen content and low purity, which adversely affect the mechanical properties of the product. The main objectives of this work were to study the effect of SHS on lowering the impurity content of the product and to examine the effect of the reactant mixing ratio on the product microstructure.

• OSTI ID: 6545760
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Vol. 26:1; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM CARBIDES
MICROSTRUCTURE
SYNTHESIS
CARBON
CHEMICAL REACTORS
IMPURITIES
MITIGATION
POWDER METALLURGY
REACTION HEAT
TITANIUM
CARBIDES
CARBON COMPOUNDS
ELEMENTS
ENTHALPY
METALLURGY
METALS
NONMETALS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies