HIP
Hot Isostatic Pressing exposes components to elevated temperature and uniform inert-gas pressure, usually argon, inside a pressure vessel. Plastic yielding, creep, and diffusion help close internal pores and establish metallurgical bonds.
Go back to home
Glossary
Let procurement, quality and engineering teams speak the same technical language
This glossary helps teams new to HIP, CIP, WIP, and HPHT understand the core concepts and communicate more efficiently during early project discussions.
CIP
Cold Isostatic Pressing uses a liquid medium to apply uniform pressure to powder or a flexible mold at room temperature. Wet-bag and dry-bag configurations are commonly used before sintering or subsequent HIP.
WIP
Warm Isostatic Pressing applies uniform pressure through a heated medium, typically below 300°C, to materials such as battery electrodes and ceramic laminates that benefit from controlled thermal softening.
PM-HIP
Powder Metallurgy Hot Isostatic Pressing consolidates metal powder inside an evacuated, sealed container. The process can produce near-net-shape components at or near full density without a separate conventional sintering step.
HPHT
High-Pressure Heat Treatment integrates densification with objectives such as solution treatment, aging, or controlled cooling. Combining these stages can reduce transfers, reheating, and batch-to-batch variation.
URC
Uniform Rapid Cooling uses forced convection of high-pressure gas to cool faster than conventional furnace cooling while managing temperature gradients across the load. It can reduce cycle time and help control distortion and residual stress.
URQ
Uniform Rapid Quenching extends high-pressure gas cooling to higher rates for alloys whose microstructure is sensitive to the cooling path. The target curve must be validated against the material transformation window and load geometry.
Hot Zone
The usable heated volume inside the pressure vessel. Its dimensions, temperature uniformity, heater and insulation design, and load-support arrangement determine the permissible part envelope and loading pattern.
Density Gradient
A variation in density within a compact. Because isostatic pressure acts uniformly from all directions, CIP and WIP can reduce the density gradients associated with friction and one-directional pressing.
Diffusion Bonding
A solid-state joining mechanism in which atoms diffuse across clean contact interfaces under temperature and pressure. HIP can support diffusion bonding in clad structures and dissimilar-material assemblies.
Canning / Encapsulation
Loose powder or atmosphere-sensitive material is placed in a metal or glass container, evacuated, and sealed before HIP. The enclosure transmits isostatic pressure while isolating the material from the process gas.
HIP Map
A material-specific map or model that relates pressure, temperature, time, and densification behavior. It helps process engineers select starting conditions for validation.
Argon / Process Gas
Argon is the most common pressurizing medium for HIP. Its chemical inertness helps protect parts from oxidation or nitriding at high temperature and pressure. Some processes use high-purity nitrogen as an alternative or supplemental gas.
Batch Traceability
Linking pressure, temperature, and time curves, load lists, alarm history, and inspection results to a batch ID creates a traceable quality evidence chain - a core requirement in aerospace and medical audits.
Near-Net Shape
A component geometry close enough to the final form that only limited finishing is required. PM-HIP can reduce material waste and machining allowances by consolidating powder directly into a near-net-shape preform.
FAT / SAT
Factory Acceptance Testing and Site Acceptance Testing verify agreed equipment functions, safety interlocks, documentation, and process-performance criteria before shipment and after installation, respectively.