Hafnium carbide HfC (at%: 42%C; 49%Hf; 7%O) was investigated under rapid heating by a current pulse, in a time of 5–8 μs. The temperature was measured by radiance of a flat surface of a carbide plate (thickness 130 microns) at a given emissivity. This carbide plate was clamped between two K-8 plates, to prevent evaporation of the …
Hafnium carbide (HfC) possesses low toughness and damage tolerance, which limits its application as high-temperature structural materials. Here we report a route to fabricate a dense HfC with high toughness by incorporating a two-component SiCN (silicon carbonitride) sintering aid, which is composed of SiCN and turbostratic carbon in …
A pure hafnium-carbide (HfC) coating layer was deposited onto carbon/carbon (C.C) composites using a vacuum plasma spray system (VPS). ... Hundred operation cycles of VPS are required to obtain a uniform coating thickness and high-quality HfC, where an operation cycle refers to the motion of plasma gun moving back and forth …
Hafnium Carbide ( HfC ) - Properties and Applications. Download PDF Copy. Request Quote. Jan 8 2004. The chemical formula for Hafnium Carbide is HfC. It is the most refractory binary compound known to man. Similarly, hafnium nitride (HfN) is the most refractory nitride known with a melting point of approximately 3305 °C.
Single-crystalline hafnium carbide (HfC) nanowires were synthesized by a Ni-catalyst-assisted chemical vapor deposition (CVD) method at 1025 °C below the eutectic temperature (TE).The synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and transmission …
Transition-metal carbides are industrially important materials with ultrahigh melting temperatures, impressive hardness and wear resistance. Among them, the …
Thirdly, the oxidation resistance is improved as the elevated oxidation energy barrier((Δ E = 2.23 eV), together with the relatively unfavourable absorption by oxygen for hafnium atom by virtue of the enhanced competition of neighboring nitrogen in the N-doped hafnium carbide system. Given the demonstrated effect, the structural …
Hafnium carbide. View Price and Availability. GF34475216. Hafnium carbide. View Price and Availability. Sigma-Aldrich. 280801. Tantalum(IV) carbide. View Price and Availability. ... Quality Level. 200. Quality Level-Quality Level. 100. Quality Level. 100. particle size <1.25 μm. particle size. ≤5 μm. particle size-particle size-Description.
As Fig. 3 shows the largest (u0004 97%) was obtained at 1600 1C. Hafnium carbide grows drop in specific surface (amount of adsorbed N2) occurs in a very well developed habitus of crystals in range of when annealing temperature increases from 1000 to 100–200 nm. In order to obtain powders as pure as 1200 1C.
Product Description. Hafnium carbide (HfC) is a gray metallic powder with a NaCl-type cubic crystal structure. It has the highest melting point among known single compounds. Hafnium carbide has high elasticity index, good electrical and thermal conductivity, very small thermal expansion coefficient and good impact resistance performance, widely ...
Advanced Refractory Metals (ARM) is a distinguished authority in the manufacturing and supply of Tantalum Hafnium Carbide (TaxHfy-xCy). As a premier manufacturer and …
Ultra-fine HfC powders with particle sizes of 380 or 225 nm were synthesized by carbothermal reduction of HfO 2 with graphite or carbon black, respectively. The investigation of the process indicated that a vacuum level as high as 5 Pa was appropriate for decreasing the reaction temperature and consequently limiting the particle growth of …
SECTION 1. IDENTIFICATION. Product Name: Hafnium Carbide Product Number: All applicable American Elements product codes, e.g. HF-C-02, HF-C-03, HF-C-04, HF-C-05 CAS #: 1 Relevant identified uses of the substance: Scientific research and development Supplier details: American Elements 10884 Weyburn Ave.
Technical Service. Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others. Contact Technical Service. Hafnium carbide powder, max. particle size 45 micron, weight 50 g, purity 99%; Synonyms: HF516010; find -GF09401891 MSDS, related ...
Hafnium carbide (HfC) is a potential candidate of ultrahigh-temperature ceramics (UHTCs) and has attracted significantly widespread interest in recent years. Here, we have synthesized high-purity HfC samples with NaCl-type structure by using a high-pressure solid–solid reaction. The structural stability, equation of state, plastic deformation, yield …
Hafnium carbide HfC (at%: 42%C; 49%Hf; 7%O) was investigated under rapid heating by a current pulse, in a time of 5–8 μs. The temperature was measured by …
As the majority of carbide ceramics are normally made by sintering of powders, their properties depend to a great extent on the quality of the starting …
We cordially invite you to shop with us for the highest quality HfC hafnium carbide powder at the most affordable price. We also promise to provide you with excellent after-sales service and prompt delivery. Storage Conditions: Airtight sealed, avoid light and keep dry at room temperature. Please contact us for customization and price inquiry.
Ceramic hafnium carbide is created by sintering powders [] using different methods of activating the process [3, 4].The initial highly dispersed carbide powders are synthesized by the interaction of metals and their oxides and hydrides with carbon in an inert or methane atmosphere [].Carbide ceramics are widely used in the metalworking, …
Hafnium carbide (HfC) is a potential candidate of ultrahigh-temperature ceramics (UHTCs) and has attracted significantly widespread interest in recent years. Here, we have synthesized high-purity HfC samples with NaCl-type structure by using a high-pressure solid-solid reaction. The structural stability, equation of state, plastic …
Comprehensive theoretical and experimental studies are performed to discover a new way of synthesis of Hf Ta C coatings. Here, an evolutionary search for stable crystal …
The inorganic nanofiller hafnium carbide (HfC) was modified with 4-amino-5-pyridin-3-yl-4H-triazole-3-thiol (APTT) and the resultant APTT/HfC was encapsulated with graphene oxide (GO) in the epoxy ...
Hafnium carbide has a density of 12.7g/cm3 and a melting point of 3890°C, which is the highest melting point among known single compounds. The volume resistivity is 1.95×10-4Ω·cm (2900℃), and the thermal expansion coefficient is 6.73×10-6/℃. Generally, hafnium dioxide (HfO2) and carbon are used to synthesize powder in an inert or ...
Hafnium carbide (HfC) is a refractory compound known for its exceptional mechanical, thermal, and electrical properties. This compound has gained significant attention in materials science and engineering due to its high melting point, extreme hardness, and excellent thermal stability. This study presents crystal structure prediction …
An excellent refractory. Hafnium carbide is the most refractory binary compound known. Hafnium carbide powder is obtained by the reduction of hafnium (IV) oxide with carbon at 1800 to 2000 °C. Hafnium Carbide Powder material, has a high modulus of elasticity, good electrical and thermal conductivity, and a small coefficient of thermal expansion.
The comparatively low reaction temperature is attributed to an intimate, atomic level, mixing of Hf and carbon which is achieved by gelation of water solution of the precursors. Increase in temperature resulted in an increase in volume fraction of formed hafnium carbide. Nearly pure hafnium carbide ( 97%) was obtained at 1600 1C. Hafnium ...
As the majority of carbide ceramics are normally made by sintering of powders, their properties depend to a great extent on the quality of the starting powders. Hafnium carbide can be prepared by heating almost any source of hafnium metal and carbon at high temperatures [7]. Several different synthesis routes for HfC powder are …
The fractured morphology of the Ta 1-x Hf x C (x = 0, 0.2, 0.5, 0.8 and 1) samples eliciting the densification and grain size as per Table 1 is shown in Fig. 1.There are no to a few slip-lines present in the monolithic carbides i.e. TaC (Fig. 1 a) and HfC (Fig. 1 e).However, in binary carbides, a few slip lines are evident in T80H20 (Fig. 1 b) while …
