Hafnium carbide
Hafnium carbide (HfC) is a chemical compound of hafnium and carbon. Previously the material was estimated to have a melting point of about 3,900 °C. More recent tests have been able to conclusively prove that the substance has an even higher melting point of 3,958 °C exceeding those of tantalum carbide and tantalum hafnium carbide which …
Facts About Hafnium | Live Science
Hafnium carbide (HfC) has the highest melting point of any known two-element compound at nearly 7,034 degrees Fahrenheit (3,890 degrees Celsius), according to Jefferson Lab.The compound hafnium ...
Crystals | Free Full-Text | Hafnium Carbide: Prediction …
Hafnium carbide is a known compound with exceptional mechanical, thermal, and electrical properties. Here, we have performed crystal structure prediction of HfC …
Molybdenum Hafnium Carbide (MHC) Alloy
Molybdenum hafnium carbide (MHC) alloy is a particle-reinforced molybdenum alloy which contains hafnium and carbon. The carbon is uniformly distributed along the alloys structure giving it excellent heat and creep resistant properties at elevated temperatures of 1550°C (2822°F). This alloy is able to function under extreme …
Hafnium (Hf)
While hafnium nitride is the most refractory of all the metal nitrides, hafnium carbide is the most refractory of all the binary …
hafnium carbide
Formula: CHf. Molecular weight: 190.50. CAS Registry Number: 1. Information on this page: Notes. Data at other public NIST sites: X-ray Photoelectron Spectroscopy Database, version 4.1. Options: Switch to calorie-based units.
Low-temperature synthesis of ultra-high-temperature HfC …
Hafnium carbide (HfC) and carbonitride (HfC x N y) nanoparticles were synthesized via reduction of HfO 2 oxide with calcium hydride in the presence of carbon or carbon/nitrogen, refractory phases were synthesized at 1473 K, respectively. The average particle size of the obtained materials was in the range of 50–90 nm, allowing them to be …
Hafnium carbide (HfC)
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 | AMERICAN ELEMENTS
Hafnium Carbide. CAS #: 1. Linear Formula: HfC. MDL Number: MFCD00016126. EC No.: 235-114-1. Email SDS. ORDER. WHOLESALE/SKU 0000-742 …
Insights into the Bond Behavior and Mechanical Properties of Hafnium …
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 …
Thermophysical properties for hafnium carbide (HfC) …
10 Citations. Explore all metrics. Abstract. Hafnium carbide HfC (at%: 42%C; 49%Hf; 7%O) was investigated under rapid heating by a current pulse, in a time …
Inexpensive synthesis of high-melting-point carbide materials
The team predicted 10 phases of hafnium-tantalum carbide that differ in the relative proportion of the two metals in the resulting material and synthesized them all using the unique experimental ...
Hafnium carbide nanoparticles for noninflammatory …
Briefly, HfC powder (1.0 g) was dissolved in 20 ml of NMP in a glass bottle. Then, the solution containing the HfC powder was sonicated using an ultrasound probe for 2.0 h in an ice bath at a power density of 300 W. Afterward, the solvent was sonicated in a water bath with 2.5 g PVP K30 (M.W. = 58000) for 24 h.
Microstructure and mechanical properties of hafnium carbide …
Composition and microstructure. The composition of hafnium carbide coatings acquired at different C 2 H 2 partial pressures analyzed by EDX is listed in Table 1.The results show that the proportion of C 2 H 2 partial pressure is very low in the synthesis of hafnium carbide coatings by reactive magnetron sputtering. When the C 2 H 2 partial …
Thermophysical properties for hafnium carbide (HfC) …
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 …
Densification, strengthening and toughening in hafnium carbide …
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 …
Hafnium: Unveiling Its Unique Properties and Industrial Uses
Hafnium is a chemical element with the symbol Hf and atomic number 72. It is a lustrous, silvery-gray metal that is commonly found in zirconium minerals. Hafnium is known for its high melting point, corrosion resistance, and ability to absorb neutrons, making it useful in various applications. It is often used in the production of superalloys ...
Synthesis of Ultra‐Fine Hafnium Carbide Powder and its
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 …
Hafnium Monocarbide | SpringerLink
where T is temperature, K, and x is the value of index in HfC 1−x formula (Eqs. ()–() were recommended for the range of temperatures from 1200 to 2500 K).The thermodynamic functions of stoichiometric hafnium carbide are tabulated by Turchanin et al. [58, 59] in the range of 0–3000 K, by Schick [] in the range of 0–3900 K and by Barin …
Insights into the Bond Behavior and Mechanical …
Hafnium carbide (HfC) is a potential candidate of ultrahigh-temperature ceramics (UHTCs) and has attracted significantly widespread interest in recent years. Here, we have …
Electronic structure and thermal conductivity of zirconium carbide …
The lattice thermal conductivity of ZrC with different Hf contents was investigated theoretically. The density of states and electron density differences were calculated for ZrC and (Zr,Hf)C containing 3.125 or 6.25 at% Hf.
Preceramic polymers to hafnium carbide and hafnium …
Hafnium carbide has a high thermal conductivity (292.88 W/moC) as does hafnium nitride (117.15 W/moC). Therefore, a mixed hafnium carbide/nitride nanocomposite should possess both a high melting point and high thermal conductivity. Selected properties of hafnium carbide, -nitride, and other materials are compared in …
Hafnium Carbide | AMERICAN ELEMENTS
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.
High-temperature mechanical properties of polycrystalline hafnium …
High-temperature mechanical properties of polycrystalline hafnium carbide and hafnium carbide containing 13-volume-percent hafnium diboride. by William A. Sanders and Hubert B. Probst. Resource Type: E-Book. ... University Libraries Staff Directory Email to report Computer & Technology Problems Email to report Facilities Problems.
Insights into the Bond Behavior and Mechanical Properties of Hafnium
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 …
Structural evolution and ablation mechanism of a hafnium carbide
1. Introduction. In the high-technology field of rocket solid propulsion, thermal protection materials constituting the nozzle and divergent inner walls are submitted to very high temperatures (2800 °C).Under such heavy solicitations, few materials can remain in the solid state [1].Carbon/carbon (C/C) composites are a family of materials that process …
Oxidation/ablation behaviors of hafnium carbide-silicon …
1. Introduction. Hafnium carbide (HfC) is a promising candidate for thermal structural materials in hypersonic vehicles due to its good thermodynamic stability and high melting point (~3900 °C), together with its high hardness, Young's modulus, and thermal conductivity at ultra-high temperatures [1, 2].However, HfC is sensitive to oxygen …
Influence of hafnium carbide on vacuum plasma spray …
The formation of the tantalum-rich carbide Ta 2 C and Ta 4 C 3 phases at lower HfC contents was explained from the carbon loss intrinsic to VPS processing. The stabilization of the TaC phase at higher HfC contents is contributed to the thermodynamic influence of hafnium in the ternary tantalum–hafnium–carbon system.
Synthesis and Electrochemical Properties of Two …
We demonstrate fabrication of a two-dimensional Hf-containing MXene, Hf3C2Tz, by selective etching of a layered parent Hf3[Al(Si)]4C6 compound. A substitutional solution of Si on Al sites effectively …
ABSCO Limited
Hafnium Carbide. CAS Number: 1. Chemical Formula: HfC. Availability: Contact ABSCO for availability. Description: ABSCO supplies hafnium carbide as a high purity powder. Applications: Hafnium carbide is supplied for uses which include advanced aerospace applications to protect critical surfaces against temperature and abrasion.
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