Centrifugal sintering system
A technology of sintering device and centrifugal force field, applied in the field of centrifugal sintering device, can solve problems such as difficulty and small deflection allowable value
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Embodiment 1
[0091] (1) Induction heating test of conductive ceramics
[0092] In the present invention, induction heating is used to heat the object to be heated by using the rotor or the member of the sample holder as a conductive material to generate heat by itself. In this case, the components of the rotor or the sample holder are required to have light weight, high strength, high thermal conductivity, etc. in addition to high electrical conductivity. Therefore, in this example, silicon carbide was selected as a material that satisfies these conditions, and tests were conducted on the heating and temperature rise characteristics of various silicon carbide ceramic members.
[0093] (2) Physical properties of test samples
[0094] As test samples, three types having greatly different electrical conductivity were prepared (Table 4). In particular, sample A is the low-resistance material with the highest conductivity, and sample C is the high-resistance material with the lowest conductiv...
Embodiment 2
[0102] This is a centrifugal sintering device in which the rotor and shaft are made of silicon carbide ceramics having the same dimensions as the samples made of silicon nitride shown in Table 4. Using this centrifugal sintering device, the temperature of the heating environment is 1200°C at a rotation speed of 30,000 min. -1 rotate. As a result, no rotational vibration due to thermal deformation occurred, and it was confirmed that high-speed operation could be performed smoothly. In addition, it was verified that the rotation speed from the rotation speed near the resonance is 32,000min -1 Vibrations began to occur, as predicted.
[0103] Sample title
Embodiment 3
[0105] In this example, a rotor with a built-in sample holder made of conductive silicon carbide ceramics (the same material as sample A shown in Example 1) for high-temperature and high-speed rotation, and a rotor made of silicon nitride ceramics for the shaft were used. Centrifugal sintering device. The dimensions of the rotor and shaft are the same as those made of silicon nitride shown in Table 3. In this device, one side rotates at 30,000min -1While rotating the rotor, use the induction heating coil of the induction heating device with a maximum output power of 30kW and a frequency of 70kHz to selectively heat only the rotor itself, and indirectly heat the sample mounted on the sample holder at 800°C / hr Heating rate to 1200°C and keeping it warm for 2 hours. As a result, the sample holder and the sample were indirectly heated to 1200°C. As a result of continuous operation for 3 hours, it can be confirmed that it can operate smoothly. Figure 9 Shown is a diagram showi...
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