TiC has higher melting point, boiling point, hardness and excellent chemical stability so that it can be widely used in tungsten carbide materials. In order to analyze the effect of TiC on tungsten carbide button, we study from the hardness, the density, the bending strength, fracture toughness and other mechanical properties. The experiment shows that with the increase of the addition amount of TiC, relative density of tungsten carbide button is rising. This is due to tungsten carbide button without TiC has some internal pores or defects by the raw material and the problems in the overall process, its relative density is lower; on one hand, TiC added refine the micro-structure of tungsten carbide button, on the other hand, ne-grained TiC particles uniformly distributed in the gap between the WC particles were packed efficiently so that the distribution of the alloy grain structure more uniform and reasonable, and thus increased densification of tungsten carbide buttons.

Viewed from the hardness, TiC has better hardness than WC, so with fine grains having a dispersion strengthening effect of TiC added, the hardness of the material also increased. However, when TiC is increased to a certain amount, the hardness of the tooth carbide ball longer because TiC added increasing amounts of rises, inside the material has been basically compact at this time. For the bending strength, with the increase of TiC addition amount of the bending strength of tooth carbide ball was dropped after the first rise and then fall. This is due to the TiC added after sintering temperature is lower than the carbonization temperature, dissolved in WC TiC slow imbalance occurs alloy, WC in solid solution reduced the amount of binder phase of Co carbide wettability deteriorated.

Tungsten alloy radiation shielding for GPS is used for shielding the electromagnetic radiation generated in the using of GPS. The Global Positioning System, referred to as GPS, is a space-based navigation system that provides location and time information in all kinds of weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. The system consists of three major segments, which are the space segment, a control segment and a user segment. The space segment is made up of 24 satellites. The control segment is composed of a master control station, a ground antennas and monitor stations. The user segment is GPS signal receiver.GPS has the characteristics of high precision, all weather, short observation time and easy operation.

Global Positioning System is a satellite navigation system designed to provide instantaneous three-dimensional position information almost anywhere on the globe at any time, and in any weather. With the continuous improvement of GPS, it has been widely used in all fields, and gradually deep into people's daily life. Such as it can be used in the patrol vehicle management to monitor the location information of vehicles for the inspection of the tasks accomplished, and to automatically complete the vehicles dispatch by analyzing the distance  from all vehicles to event point and the current state of vehicles. In the car navigation and traffic management, GPS can be used for navigation by aircraft, ships, vehicles and pedestrians; in a navigator, the GPS can achieve the function of map query, route planning, self-navigation and other. GPS systems can also be used in military, fire fighting, logistics and other fields.

GPS is mainly to receive satellite signals through electromagnetic waves. The electromagnetic radiation has radiation characteristic that can cause harm to the body's central nervous system, immune function, cardiovascular system, reproductive system, vision system. Therefore, it should be accompanied by the use of certain radiation protection measures (such as using tungsten alloy radiation shielding for GPS) to protect the human body when using GPS. Tungsten alloy radiation shielding for GPS has good radiation shielding ability, and can shield electromagnetic radiation to avoid human suffering from radiation damage in the long-term electromagnetic radiation environment.

Tungsten alloy radiation shielding for DSA system is a tungsten alloy shielding used for digital subtraction angiography system. DSA system, also known as digital subtraction angiography system, is a new x-ray imaging system to clearly visualize blood vessels in a bony or dense soft tissue environment by computer. Images are produced using contrast medium by subtracting a ‘pre-contrast image’ or the mask from later images, once the contrast medium has been introduced into a structure. Compared to the conventional angiography system, images obtained by digital subtraction angiography system are more clearly and intuitively, even some fine vascular structures can be displayed.

Digital subtraction angiography system is suitable for the examination of heart and great vessels. It clearly shows the structural abnormality of heart anatomy, coronary, aortic coarctation, aortic dissection, aortic aneurysm, developmental anomaly of aorta, etc; and also clearly shows the cervical segment and intracranial arteries for diagnosing intracranial aneurysms, cervical artery stenosis or occlusion, vascular anomaly, arterial occlusion and for observation of intracranial tumor‘s feeding artery. In addition, digital subtraction angiography system can be used to check large blood vessels, abdominal aorta and its branches. At the same time, digital subtraction angiography system can also be used for the interventional treatment in all parts of the body lesions, such as interventional embolotherapy in treatment of liver cancer, cerebral aneurysms, cerebral arteriovenous malformation，and percutaneous balloon mitral valvuloplasty, percutaneous puncture biopsy.

Since digital subtraction angiography system is an X-ray angiography system basing upon image subtracting. And X rays can inhibit, destroy or even kill biologic cells, causing different degrees of changes in physiological, pathological and biochemical aspects of organism. Therefore, it is need to use a tungsten alloy radiation shielding to shield and absorb X rays when using the digital subtraction angiography system. Tungsten alloy radiation shielding for DSA system has excellent radiation shielding performance to shield radiation and avoid it damaging human body.

Tungsten alloy shielding can be used to shield the radiation released from the radioactive tracer technique. Radioactive tracer technique is used to track the passage of a sample of substance through a system. The substance is "labeled" by including radioisotopes in its chemical composition. When these decay, their presence can be determined by detecting the radiation emitted by them. Then the movement condition and change rule of the substance can be distinguished. Radioactive tracer technique has the characteristics of high sensitivity, high quantitative accuracy, simple method, accurate localization and conforming to the physiological conditions, etc.

Radioactive tracer technique has been widely used in industrial production, agriculture and animal husbandry, health care, life sciences, and other fields. In agriculture and animal husbandry, it can be used to study the fertilizer absorption rule of crops and discovery the life cycles, migratory habit, mating behavior and foraging behavior of insects, parasites, fishes and animals; in medicine, it is mainly used for the diagnosis of the disease; in industrial production, it provides the possibility of using a variety of high-efficiency testing methods and automatic control methods for the production process, solving many technical and theoretical issues, such as determining the diffusion rates of certain elements within the metal sheet; in the life sciences, it can dynamically observe the physiological and biochemical processes within the cell or in vivo at molecular level, understanding the material basis of life activities. Check the chemical reaction process of research of environmental pollution radioisotope tracer technique can also be used. Radioactive tracer technique can be also used for the detection of environmental pollution and research of a chemical reaction process.

Radioactive tracer technique has found an increasingly wide utilization in our life. But due to the rays released form it will cause harm to human body, the use of tungsten alloy radiation shielding in the radioactive tracer technique is necessary. Generally, tungsten alloy shielding is made up of tungsten heavy alloy which has high density and great shielding effectiveness. Thus tungsten alloy shielding can shield the radiation to protect the staff from radiation damage.

In order to improve mixed-pressing, relevant scholars uses activated agent (Ni, Pd and other activated elements) to increase the solubility of W in liquid phase, which is beneficial for the sintering process. However the additives have a bad influence on the electrical and thermal conductivity of tungsten copper products. Pressure sintering is a kind of secondary processing after sintering, especially for the conditions that one-step forming can not meet the requirements. Although hot pressing, repressing and re-sintering and HIP (Hot Isostatic Pressing) can remarkably improve the properties of tungsten copper composite material, they are limited by the costs and the efficiency. In addition, using hammering or cold rolling of tungsten-copper composite material for secondary processing can greatly increase the density and mechanical properties of the material. But when the content of W is higher, the ductility of tungsten copper will decrease and the difficulty of machining will increase.

Spark Plasma Sintering (SPS), which is also known as Plasma Activated Sintering (PAS) or Field Assisted Sintering Technology (FAST). According to different powder media, SPS can be divided into conductive and non-conductive, there is a big difference in mechanism between them. Generally, conductive SPS will produce a large amount of Joule heat generated by DC pulse current graphite mold; and the current through the powder will induce electric discharge between powder particles and arouse plasma. With the increasing density of plasma, High-speed reverse movement of the particle surface of the particles have a greater impact, so that the gas adsorption of escape or break an oxide film, so that the surface to be purified and activated, will be conducive to sintering. However, instantaneous high temperature generated by the discharge causes evaporation and melting of the grain surface, the grain at the point of contact to form sintered neck.